Feature Request - Mouse Lock
It would be great if we had an option to lock the mouse to keep it inside the game window.

If you approach this the same way [raylib](https://github.com/raysan5/raylib/issues/257) [does](https://github.com/raysan5/raylib/commit/fd1fe3ac14adbd4bdc8ed409a65aad9d7d7133ca), it will be implemented as two functions:

something like:
- `lock_mouse()`
Lock mouse

- `unlock_mouse()`
Unlock mouse
