Implement better algorithm (QDollar) to enable full gesture recognition

[patrykkalinowski]

Current solution in hand recognition module is pretty simplistic and takes into account only finger positions in relation to wrist. For example, it doesn't differentiate between thumb_up and thumb_down.

Also, full gesture recognition like hand wave requires tracking full hand movements over time.

There is an algorithm called $Q Super-Quick Recognizer (QDollar), designed specifically for recognising hand gestures. It has been implemented in GDScript already, but only for 2D.

Adapting QDollar for 3D in GDScript would enable full recognition of hand gestures in motion, not only hand poses