Add the ability to write Devices in Rust

[ginnyTheCat]

This allows creating Devices in Rust by implementing the NativeDevice trait and calling the Device::from_native() function.

[itsjunetime]

Are you interested in any sort of help for this feature? I'm also very interested in being able to write devices in rust, so I'd like to help push this through if possible :)

[ginnyTheCat]

The branch is already usable, i just need to finish implement all methods. I'm also not sure what the best name is (atm I called the trait CustomDevice but idk if there is sth better).

I will probably finish this PR on Monday.

[itsjunetime]

This makes sense to me. It's a bit annoying that every device-related function has to be sort of duplicated 3-4 times, but I can't really see a way around it.

[ginnyTheCat]

My main annoyance is that Rust doesn't provide a way to implement impl<T: Trait + ?Sized> Trait for &mut T without writing immense amounts of code just piping the calls through.

Especially as this is a quite common pattern.

[messense]

Thanks!