[Build] Add README to public NuGet Packages

[VaclavElias]

Is your feature request related to a problem? Please describe.

Our build Stride.sln process is logging around 60 messages for missing readme file.

Code	File	Line	Column
24>The package Stride.Core.ProjectTemplating.4.2.0.1 is missing a readme. 
Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		763	81

Describe the solution you'd like

We should create a template which would be used for all our NuGet packages, also important NuGet packages could have unique readme files. This might help with discoverability of Stride project itself, as we can provide important links in the readme and drive traffic to our project from all NuGet packages.

https://learn.microsoft.com/en-us/nuget/create-packages/package-authoring-best-practices#readme

• Add description, example: <Description>Core assembly for all Stride assemblies.</Description>
• Add README as recommended

Describe alternatives you've considered

No ideal but suppressig these messages.

Additional context

Full list:

6>The package Stride.Irony.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		186	63
5>The package Stride.Core.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		192	62
8>The package Stride.Core.IO.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		255	65
9>The package Stride.Core.MicroThreading.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		265	77
10>The package Stride.Core.Mathematics.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		268	75
7>The package Stride.Core.Translation.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		271	74
11>The package Stride.Core.Shaders.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		277	71
14>The package Stride.Core.Translation.Presentation.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		284	88
12>The package Stride.Core.Serialization.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		318	77
15>The package Stride.Core.Reflection.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		393	74
16>The package Stride.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		455	58
17>The package Stride.Core.Yaml.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		472	68
13>The package Stride.Native.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		490	65
18>The package Stride.Shaders.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		525	66
19>The package Stride.Core.Design.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		534	70
26>The package Stride.Core.BuildEngine.Common.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		619	82
22>The package Stride.Core.Presentation.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		622	76
25>The package Stride.Core.Quantum.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		647	71
21>The package Stride.Shaders.Parser.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		756	73
20>The package Stride.Audio.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		759	64
27>The package Stride.Core.Presentation.Wpf.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		767	80
28>The package Stride.Core.Presentation.Quantum.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		787	84
23>The package Stride.Core.Packages.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		796	72
29>The package Stride.Shaders.Compiler.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		814	75
31>The package Stride.Core.Presentation.Dialogs.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		832	84
30>The package Stride.Core.Presentation.Graph.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		836	82
32>The package Stride.Core.Assets.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		864	70
33>The package Stride.Core.Tasks.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		912	69
34>The package Stride.Core.Assets.Quantum.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		917	78
35>The package Stride.Samples.Templates.4.2.0.2-dev is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2543	80
37>The package Stride.Core.Assets.Editor.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2558	77
36>The package Stride.Graphics.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2579	67
40>The package Stride.Games.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2749	64
38>The package Stride.Graphics.RenderDocPlugin.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2753	83
39>The package Stride.TextureConverter.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2832	75
42>The package Stride.Input.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		2867	64
41>The package Stride.Rendering.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3293	68
43>The package Stride.VirtualReality.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3357	73
44>The package Stride.Engine.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3472	65
45>The package Stride.BepuPhysics.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3639	70
52>The package Stride.UI.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3642	61
51>The package Stride.Physics.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3657	66
48>The package Stride.Particles.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3671	68
49>The package Stride.SpriteStudio.Runtime.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3678	79
46>The package Stride.Voxels.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3758	65
47>The package Stride.Video.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3760	64
50>The package Stride.ConnectionRouter.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3764	75
53>The package Stride.Navigation.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3793	69
54>The package Stride.Assets.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3919	65
55>The package Stride.Importer.Common.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3971	74
58>The package Stride.Debugger.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		3989	67
57>The package Stride.EffectCompilerServer.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4011	79
59>The package Stride.Importer.3D.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4027	70
60>The package Stride.Assets.Models.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4064	72
56>The package Stride.SpriteStudio.Offline.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4072	79
61>The package Stride.Core.Assets.CompilerApp.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4096	82
62>The package Stride.Editor.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4141	65
63>The package Stride.Assets.Presentation.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4509	78
64>The package Stride.GameStudio.4.2.0.1 is missing a readme. Go to https://aka.ms/nuget/authoring-best-practices/readme to learn why package readmes are important.		4559	69