- Enums of type byte were not implemented, only uint and ushort were recognised.
- Added XML comments to the structs, and their fields.
- Added default values to parameters
 - For the handles, it was not possible to have Invalid as a default parameter. Instead i emit another method without the argument, that calls the `extern` with an Invalid handle.
 This also required some overhauling for those structs, and i've also implemented some recommended fields to improve performance (https://learn.microsoft.com/en-us/visualstudio/ide/reference/generate-equals-structs?view=vs-2022).

These caused more friction than intended. Only the `Invalid` readonly field remains, and a constructor that includes the index parameter are additions.