refactor(windows): use http scheme by default for custom protocols and add option to change it

[FabianLars]

We get pretty much daily requests/complains about tauri-apps/tauri#3007 and since http://localhost is still a secure context and using http will now match the behavior when using custom schemes (on Linux&macOS) i think this is honestly a no-brainer at this point.

I do plan to backport this to the version used in tauri 1.x after we polished&merged this PR :)

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Checklist

• This PR will resolve How to make tauri use http://tauri.localhost/ instead of https://tauri.localhost/ ? The page was blocked since the page was loaded over HTTPS. tauri#3007
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary
• It can be built on all targets and pass CI/CD.

Other information

[amrbashir]

Maybe we could make this the default (and flipped around if ported to tauri 1.x ofc)? what about android too?

[FabianLars]

Maybe we could make this the default (and flipped around if ported to tauri 1.x ofc)?

Sounds good to me.

what about android too?

1. idk its limitations == didn't know if it's even possible
2. idk how ios behaves -> whether it allows http and https requests like linux/macos

[amrbashir]

what about android too?

1. idk its limitations == didn't know if it's even possible
2. idk how ios behaves -> whether it allows http and https requests like linux/macos

Alright, lets worry about it later since mobile is still in alpha.

[Dirreke]

Hello! I'm not famaliar about it. I want to consult that if we should change https://github.com/tauri-apps/tauri/blob/af3268a4be69e2dee72ba867ee54bc36d12712e6/core/tauri/src/manager.rs#L515 to http too after this?

Except it, What others should I do to use tauri with a http backend? And if tauri-2.X can use it? Thanks!

[FabianLars]

@Dirreke For v1 i'm working on it here: tauri-apps/tauri#7645 (mainly waiting for a new wry release). With the release of 1.5 we'll merge v1 into v2 one last time so this change will also be available in a future v2 release.