added event listener and conditions for block breaking
- engine has to be on and a player in the driver seat
- block breaking depends on feature availability in your FCL/FVTM version (1.12 works)
added C13 LightBeam Part (experimental), installable separately
removed 'driver' seat from Excavator, made the 'controller' a driver seat now, use the new FVTM control mode toggle (def K key) to toggle between control modes