Add mouse movement

[clecat]

I was thinking that having the ability to track the movement of the mouse would be quite nice, so I tried digging a bit and it seems that it can be done quite easily by de-commenting the move inputs in the event_of_control_code function and using the mode 1003 instead of 1002 (which activates the tracking of all mouse input even without any button pressed).

However it might have an impact on the performances & other secondary effects I am not aware off (I have very little knowledge on the subject). What do you think of it @pqwy ? Maybe it can be added but toggled off by default ?

Here is the diff file:
diff.txt