feat(bindings/dotnet): basic structure

[tisonkun]

This refers to #2428.

You can run with -

./build.py --classifier osx-aarch_64
dotnet test 

[Xuanwo]

Mostly LGTM. Perhaps we can merge this pull request first and then polish it?

[tisonkun]

Mostly LGTM. Perhaps we can merge this pull request first and then polish it?

Yes. Two major improvement should be done are -

1. Marshalling and Unmarshalling struct (maybe including strings);
2. Building and distributing (via NuGet).

References are provided in the tracking issue, while I may not be able to find some time dig into it until the next month.

[Xuanwo]

Thanks!