Fixes #4200. ExtendedCharInfo needs be enhanced to properly deal with all codepoints

[BDisp]

Fixes

• Fixes ExtendedCharInfo needs be enhanced to properly deal with all codepoints #4200
• Fixes Legacy consoles width shrink on restore after maximize #4219

Proposed Changes/Todos

• Add support for surrogate pairs in WindowsOutput and WindowsDriver
• Also supports 16 Colors with a supported font

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

[BDisp]

I spend much time to deal with resize window issues using VSDebugConsole and WSLg but finally I realized that doesn't worth because seems that them are buggy working as legacy consoles with VTS enabled. From now I'll only rely on cmd.exe and conhost.exe in Windows and gnome-terminal in WSLg, where the existent code NetDriver works as expected.

[tig]

@BDisp please fix conflicts and tests failures and I'll review

[BDisp]

@BDisp please fix conflicts and tests failures and I'll review

Done.

[tig]

Warnings have gotten out of control again.

For each of the files you touch in this PR, can you please ensure there are no warnings generated on build?

I should have asked @tznind to do the same with his iteration zero PR, but dind't notice until too late.

Thanks.

[BDisp]

I think almost the CI build warnings, but not the obsolete ones, were suppressed.

[BDisp]

I'm also ignoring the follow Unchanged files with check annotations (Preview) because I don't want to touch more unchanged files.