Add design metadata for RichSuggestBox

[huynhsontung]

Adding design metadata for RichSuggestBox.

PR Type

What kind of change does this PR introduce?

• Other... Improve Visual Studio design tool integration

What is the current behavior?

No metadata for RichSuggestBox control.

What is the new behavior?

Design metadata is added for RichSuggestBox

PR Checklist

Please check if your PR fulfills the following requirements:

• Tested code with current supported SDKs
• Pull Request has been submitted to the documentation repository instructions. Link:
• 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 huynhsontung 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 🙌

[michael-hawker]

Thanks @huynhsontung! @Nirmal4G this look good to you?

[Nirmal4G]

Looks good to me 👍. I thought of filling the gaps with source generators but hey… this is not so bad in the meantime. I'll also add basic support for media controls.

Thanks so much for this.🚀