OpenAxis 1.0 spec and migration

Finalize the OpenAxis spec based on what’s been learned so far.

Will enable:

  • Keep plugin behaviors consistent (especially pivot selection logic)
  • New pivot selection behaviors - e.g. center of object, not just surface points
  • Object manipulation, not just camera navigation
  • Simultaneous control with mouse/SpaceMouse - stop controls from fighting
  • Quickly onboarding new integrations