AOT - Fix UICatalog to support building as PublishSingleFile

[tznind]

Fixes

• Terminal.Gui doesn't support AOT #2414 - API changes to support running UICatalog under various publish options.

Starting with PublishSingleFile. May also look into, trimmed and/or AOT etc

These changes must be backwards compatible.

<PropertyGroup>
	<PublishSingleFile>true</PublishSingleFile>
	<RuntimeIdentifiers>win-x64</RuntimeIdentifiers>
</PropertyGroup>

Pull Request checklist:

• I've named my PR in the form of "Fixes #issue. Terse description."
• My code follows the style guidelines of Terminal.Gui - if you use Visual Studio, hit CTRL-K-D to automatically reformat your files before committing.
• My code follows the Terminal.Gui library design guidelines
• I ran dotnet test before commit
• I have made corresponding changes to the API documentation (using /// style comments)
• My changes generate no new warnings
• I have checked my code and corrected any poor grammar or misspellings
• I conducted basic QA to assure all features are working