Support for Varjo HMD eye tracking

[CoffeeKei]

Is your feature request related to a problem? Please describe.

No

Relevant issues

#1140
#1696
#2275

Describe the solution you'd like

Added support for Varjo eye tracking.

Describe alternatives you've considered

N/A

Additional context

This is a proactive feature request to support eye tracking on the new Varjo Aero HMD announced today, as well as the VR-3 and XR-3.

The official SDKs can be found on the Varjo Developer site here: https://developer.varjo.com/

SDK downloads direct link: https://developer.varjo.com/downloads#native-developer-assets

[dfgHiatus]

I have a workaround for this issue: https://github.com/dfgHiatus/NeosVarjoEyeTracking