Use fpxr.h instead of old fpxr_public.h
Remove unused native -> managed GetHmdMatrix function
Implement world scale, tracked object list
Only init with a debug messenger if launched with -vrdebug, remove some unused stuff
Go through VR performance stats, obsolete everything we can't fetch (not sure there's much point keeping this at this stage 😅)
Implement functions for Facepunch.XR get instance properties
`vr_info` concommand cleanup, uses tracked objects from Input.VR