Rust/.NET interop

[FractalFir]

This is the issue tracking the progress of Rust/.NET interop.

• [X] A way to pass class info to the backend
• [X] Backend recognizes and handles classes properly
• [X] Backend recognizes and handles any dimensional managed array types properly
• [X] Rust References to managed objects
• [X] A way to specify constructor to invoke
• [x] A way to specify a method to invoke
• [X] Argumentless constructor can be called
• [x] Constructor with arguments can be called
• [x] A static method without arguments can be called
• [x] A static method with arguments can be called
• [x] Calling of instance methods
• [ ] Getting values of fields
• [ ] Setting values of fields
• [ ] Getting values of statics
• [ ] Setting values of statics
• [ ] Getting elements of 1D arrays
• [ ] Setting elements of 1D arrays
• [ ] Getting elements of nD arrays
• [ ] Setting elements of nD arrays
• [ ] Safe wrapper around reference types
• [ ] Safe wrapper around method invocation
• [ ] Nullability support