[Development] Resurrecting QtGamepad

[Tim Blechmann]

> - are there things we want to do to support a broader use case?

thinking out loud: gamepads tend to be HID devices. there might be a use 
case for a more generic HID implementation in Qt, not only supporting 
gamepads but a wide range of devices that talk HID (possibly including 
custom hardware) and possibly allow bidirectional communication (to e.g. 
control LEDs on HID devices)