.NET MAUI support

[tranb3r]

I've started working on a maui branch

Current status:

• tests are ok on ios and windows in debug mode
• build fails on android: androidx issue
• everything related to nugetizer has been temporarly removed and will have to be added again
• release mode not tested ; proguard and linker probably need to be fixed

[tranb3r]

New build issue: dotnet/maui#10150

[tranb3r]

Android build has been fixed thanks to xamarin/GooglePlayServicesComponents#648
And there is a workaround for the other build issue.

Current status:

• tests are ok on all platforms (android, ios and windows) in debug mode
• everything related to nugetizer has been temporarly removed and will have to be added again
• release mode not tested ; proguard and linker probably need to be fixed

[tranb3r]

New issue found:
Logging does not work properly on old versions of ios/android because of this issue:
serilog/serilog-sinks-xamarin#29

[tranb3r]

Current status:

• tests are now ok on all platforms, both in debug and release mode
• nuget can now be generated (via nuspec)

Two issues remaining (minor):

• r8 warning on android : R8 : warning : Missing class androidx.window.extensions.WindowExtensions dotnet/maui#10901
• serilog logging on old platform versions (link above)

[tranb3r]

Version 2.0.0 has been released.
I'll keep this issue open to track the progress of both remaining issues.

[tranb3r]

I don't know why, but serilog issue is not happening anymore.
R8 warning can be ignored and will be hidden in the next verison of xamarin.android.