Add support for NativeAOT

[insinfo]

Add support for NativeAOT as NativeAOT will be present as part of .NET 7.0.
The NativeAOT ahead-of-time (AOT) toolchain can compile .NET application into a native (architecture specific) single-file executable. It can also produce standalone dynamic or static libraries that can be consumed by applications written in other programming languages.

In I intend to use libraries made with C# in Flutter/dart/ffi/rust projects

https://github.com/dotnet/runtimelab/tree/feature/NativeAOT