iOS and Android require the MAUI workload to debug

[ThomasFOG]

In order to run and debug iOS/Android apps with .NET, installing the iOS or Android workload are not enough.

dotnet workload install ios and dotnet workload install android will not install the debugging tools.

And likewise for Visual Studio: installing the mobile package will not include the debugging extensions for mobile .NET apps.

The actual debugging tools are all hidden inside the MAUI workload and package. Even though MonoGame doesn't use MAUI, MAUI is required to just run and debug apps.

Hence, mobile development requires dotnet workload install maui and the Visual Studio package for MAUI development.

The getting started documentation of MonoGame indicate to use dotnet workload install ios and/or dotnet workload install android only. We should add the need to have both dotnet workload install maui and the Visual Studio MAUI package (or mobile develop workload, which includes MAUI).