[Enhancement] Provide VS or VSCode a iOS project setting ui like XCode provided

[jingliancui]

Summary

Mono's mtouch arguments is powerful for setting arguments to the Xamarin.iOS' project.

But I hope Visual Studio and Visual Studio Code can do these settings operations by the "Settings" UI.(not remove mtouch arguments feature! because I like it very much)

Something 3rd party Library need integrate more .Frameworks and .dylib and something setting like -fobjc-arc. I know all these settings can be done in mtouch arguments like this:
-gcc_flags "-fobjc-arc -liconv -lsqlite3.0 -lstdc++ -lz -framework Security -framework SystemConfiguration -framework CoreGraphics -framework CoreTelephony"

I think it is possible to provide some UIs for the new Xamarin.iOS Developers to set these settings more easier like the XCode provided ,one example is this:

API Changes

nothing

Intended Use Case

The Experienced Xamarin.iOS developers can do these keep using the mtouch arguments command feature, and the new Xamarin.iOS developer can use the new setting UI for easy add some frameworks,dylibs and other iOS dev settings.