.NET6 Xamarin tooling is supported by VS and VS4M so apps can be compiled, debugged and deployed

[maddymontaquila]

[danmoseley]

@marek-safar do we need a story for the Mono/Libraries part of this work -- ie., any work in dotnet/runtime? I think that would help capture what my team must do vs . yours.

[Dotnet-GitSync-Bot]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[marek-safar]

@danmosemsft I clarified the title a bit to describe the work better. The user story you were asking for is dotnet/runtime#44654