feat: GamePad controller inputs

[Thomaltarix]

I bound all the keyboards inputs to GamePad inputs.

Now you can do everything you do with a keyboard with a GamePad, except closing the window ('coz it segfault).

Note

I don't know if every type of GamePad is accepted by raylib or not

[theophile-jr]

LGTM

[mathieurobert1]

Overall it's great.
The closing segfault is because you close Raylib but some raylib's functions are called after that.
To secure the well-closing of the window, a variable _isEndGame is present in GameData to close properly the window.