Digitals Boxing Ring collision hands demo

[BastiaanOlij]

First in a couple of PRs that will add Digitals boxing ring demo (#478) into XR Tools while solving a number of rebase issues and adjust the demo to work with the logic we're polishing up.

I'm not finished with this yet as time is short but some early feedback would be appreciated.

Things that will be fixed/dealt with in follow up PRs:

• Digitals improvement that copies collision shapes when you grab an object is still missing from this (I'm also planning on adding collisions for fingers)
• Digitals improvement for reacting to the weight of the item being picked up is still missing from this
• When dropping an object it will often collide with the collision hands and go flying off, Malcolm is working on a fix for this
• The climbing wall will return, we're working on a different solution for the hand grabbing.
• Two handed pickup will return, this was still experimental even in Digitals PR and we want to separate it out so it doesn't become a blocking issue.

[DigitalN8m4r3]

bump
from what i understand, this apparently will not be completed for 4.3 and we might want to move this to xr tools v2.

from my pov, i tried recreating the pickable collision logic with the New collision hand and it falls and overcomplicates, we would need to account for twohanded and for evry other extra handposition, this would mean to either move the collision copy evry time or to Delete and recreate it, this Producess unwanted physics reactions

Regarding weight, i was unable to add drag to the forcebody3d node, probably just my lack of skill here.

Amyways, this pr is soon havin its 1st birthday, so cake or no is the question