Nebulaxin

There is `"omnisharp.analyzeOpenDocumentsOnly"` option in settings

Right now I am trying to remake commonly used features from newer language and BCL versions like Span and interpolated strings I made this pull request so almost all features...

Yes, there is no need to use C#12; this pr exists just so there will be no errors if C#5+ features areel used; I also made another pr with all...

Default stack size is [1.5 MB](https://github.com/dotnet/runtime/blob/90d4c7d41a3fb3390cdcca598fc34cc6b986c75e/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Windows.targets#L36), and that can be not enough for texture; for example, 1024x1024 color texture is 4 MB