Auto-copy bindings to Unity project on compile

[Frooxius]

Currently when the bindings are compiled, the new binaries must be copied manually. The project should be setup to do this automatically.

More specifically when this project gets compiled:
https://github.com/Yellow-Dog-Man/Resonite.UnitySDK/tree/main/BindingsGenerator/Resonite.UnitySDK.Bindings

Its build output needs to be copied here:
https://github.com/Yellow-Dog-Man/Resonite.UnitySDK/tree/main/Assets/ResoniteSDK/Plugins