Add GAN V4 gyroscope support

[shreyasminocha]

• Make the virtual cube move with the smart cube
  • Make it move correctly
• Fix twisty scene camera location
• Allow toggling gyroscope from settings
• Refactor code for production

Stretch:

• Smooth animation across orientation updates
• Use axis speeds when rotating

Out of scope:

• Use gyroscope to inform virtual reconstruction (VR) orientation
• Include gyroscope data in VR

Related: #442 and #213. Hopefully, once this PR is ready, it will be easier to add support for other smart cubes.

[shreyasminocha]

Currently, the quaternion I'm constructing from the BLE data is incorrect: it doesn't mirror the orientation of the smart cube. Paging @afedotov (author of #419) in case they know what's wrong.

[shreyasminocha]

Okay, I managed to fix the quaternion parsing issue thanks to @afedotov's gan-web-bluetooth.