Coverage of GameInput API

### Suggestion

Hello,
I am trying to use the GameInput API through `windows-rs`.
I enabled all the Gaming related features but the GameInput API seems to be incomplete. For example, the entire `IGameInput` Interface is missing or some other types relating to keyboard and mouse like `GameInputKeyboardInfo` or `GameInputMouseState` are also missing.

I tried generating the bindings myself from the header that comes with the GDK package but rust bindgen cannot process the "COM lite" or "nano-COM" style code and I don't know how to generate a proper `.winmd` file for it. Bindgen has no issues with the C-Style API of the other GDK classes but `GameInput.h` poses a problem.

Any pointers would be much appreciated.

Start with the GDK GameInput.h header and compare its declarations with the GameInput API exposed through windows-rs. Investigate how the COM lite or nano-COM declarations could be represented in a .winmd, since bindgen cannot process them. Done means coverage includes IGameInput, GameInputKeyboardInfo, and GameInputMouseState.

Written by the indexing model from the issue text.