Support for 8BitDo controller's back paddles (p1 and p2)

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is your feature request related to a problem? Please describe.

Since the back paddles of 8BitDo's controllers are limited to button exchange and macros, these need to be recognized as independent buttons so we can give another functionality to them.

### Describe the solution you'd like

_No response_

### Describe alternatives you've considered

_No response_

### Additional context

_No response_