Add basic physics implementation for OMI_collider and OMI_physics_body

[robertlong]

Co-authored-by: Anthony Burchell [email protected]

[antpb]

Just leaving some screenshots for folks that may want to browse.

Here we have a complex model with a mesh named physicsBody wrapped around the pda device to be used as the trimesh collider in our threejs scene using Rapier for physics. (https://rapier.rs/)

For the mesh we just cloned the body of the device and scaled outward removing the materials. In blender you can use the eye icon to hide it while working on your object. Exporting a glb will include those hidden objects.

Below is a video of where it is so far.

physicstrimmed.mov

I'm pushing up some camera value changes. This video shows those changes. Zoomed in a bit so we can see the meshes better.