Enable Roslynator Analyzers via Nuget Package

[JustinGrote]

This requires the following packages to be added to the Build Feed

Roslynator.Analyzers
Roslynator.CodeAnalysis.Analyzers
Roslynator.Formatting.Analyzers

Rosylnator used to be used via vscode extension but since the switch to C# Dev Kit, Support for that has been non-functional (dotnet/vscode-csharp#6790)

The analysis packages are now made available as Nuget packages, and this PR integrates them into the non-test repositories. This is the first step to later revise EditorConfig to enforce consistent code style among repositories.

Style-related recommendations based on current editorconfig (these are info recommendations and not enforced)

Analyzed solution 'D:\PowerShellEditorServices\PowerShellEditorServices.sln' (in 22.4 s)

  4 CA1510    Use ArgumentNullException throw helper
  2 CA1826    Do not use Enumerable methods on indexable collections
  2 CA1837    Use 'Environment.ProcessId'
  6 CA1859    Use concrete types when possible for improved performance
 10 CA1861    Avoid constant arrays as arguments
  1 CA2208    Instantiate argument exceptions correctly
  1 CA2249    Consider using 'string.Contains' instead of 'string.IndexOf'
  3 CS1998    Async method lacks 'await' operators and will run synchronously
  4 CS4014    Because this call is not awaited, execution of the current method continues before the call is completed
 74 IDE0028   Simplify collection initialization
 12 IDE0090   Use 'new(...)'
  2 RCS1015   Use nameof operator
  8 RCS1036   Remove unnecessary blank line
  1 RCS1075   Avoid empty catch clause that catches System.Exception
  4 RCS1097   Remove redundant 'ToString' call
  9 RCS1163   Unused parameter
  2 RCS1214   Unnecessary interpolated string
  1 RCS1218   Simplify code branching
 14 RCS1251   Remove unnecessary braces from record declaration
  2 RCS1267   Use string interpolation instead of 'string.Concat'
  1 VSTHRD104 Offer async methods
  3 xUnit1004 Test methods should not be skipped
  4 xUnit1042 The member referenced by the MemberData attribute returns untyped data rows
 26 xUnit2023 Do not use collection methods for single-item collections

Copilot reviewed 1 out of 4 changed files in this pull request and generated no suggestions.

Files not reviewed (3)

• Directory.Packages.props: Language not supported
• src/PowerShellEditorServices.Hosting/PowerShellEditorServices.Hosting.csproj: Language not supported
• src/PowerShellEditorServices/PowerShellEditorServices.csproj: Language not supported