Converted issue templates to use Forms

[Arlodotexe]

Fixes

Fixes #4177

PR Type

What kind of change does this PR introduce?

• Other: GitHub feature

What is the current behavior?

Markdown is used for issue templates.

What is the new behavior?

Updates templates to use the new "GitHub Forms Schema"

PR Checklist

Please check if your PR fulfills the following requirements:

• Tested code with current supported SDKs
• New component
  • Pull Request has been submitted to the documentation repository instructions. Link:
  • Added description of major feature to project description for NuGet package (4000 total character limit, so don't push entire description over that)
  • If control, added to Visual Studio Design project
• Sample in sample app has been added / updated (for bug fixes / features)
  • Icon has been created (if new sample) following the Thumbnail Style Guide and templates
• New major technical changes in the toolkit have or will be added to the Wiki e.g. build changes, source generators, testing infrastructure, sample creation changes, etc...
• Tests for the changes have been added (for bug fixes / features) (if applicable)
• Header has been added to all new source files (run build/UpdateHeaders.bat)
• Contains NO breaking changes

Other information

[ghost]

Thanks Arlodotexe for opening a Pull Request! The reviewers will test the PR and highlight if there is any conflict or changes required. If the PR is approved we will proceed to merge the pull request 🙌

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All CLA requirements met.

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[ghost]

This PR has been marked as "needs attention 👋" and awaiting a response from the team.

[Arlodotexe]

@michael-hawker Ping, should be all finished here

[michael-hawker]

@XAML-Knight think we're all good now, eh? Any other concerns?

[XAML-Knight]

Looks good - devs will probably prefer to interact with these new templates.