Add Analyzer and CodeFixProvider for Initializing Bitmap with a "avares" scheme argument.

[rabbitism]

What does the pull request do?

It is a common mistake (at least for beginners) to initialize a bitmap from Avalonia Asset directly like

var bitmap = new Bitmap("avares://Assembly/Directory/Name.jpg");

This PR introduce a code analyzer and a corresponding CodeFixProvider to help address this issue, and replace with correct usage: Use AssetLoader to open as a stream first.

Notice: All Diagnostic Id and descriptions can be updated according to team feadback.

What is the current behavior?

Nothing is reported.

What is the updated/expected behavior with this PR?

warning:

fix action:

after fix:

How was the solution implemented (if it's not obvious)?

Checklist

• Added unit tests (if possible)?
• Added XML documentation to any related classes?
• Consider submitting a PR to https://github.com/AvaloniaUI/avalonia-docs with user documentation

Breaking changes

Obsoletions / Deprecations

Fixed issues

[avaloniaui-bot]

You can test this PR using the following package version. 11.3.999-cibuild0054849-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[MrJul]

@rabbitism Can you please update your branch to re-trigger CI?

[avaloniaui-bot]

You can test this PR using the following package version. 11.3.999-cibuild0054952-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]