feat: Add Primitive Colliders

[mikhail-dcl]

Closes #36

PBMeshCollider component is taken care of:

• Created an additional component to hold the parameters required for the systems
• Created a system that instantiates and takes care of changes in PBMeshCollider and reflects them onto Unity objects
• Created a system to invalidate the outdated shape and return it to the pool
• Used UnityComponentPool for Colliders
• Introduced a meaningful size limit for such pools
• Took the logic of Cylinder shape generation from the old renderer but cleaned up it heavily and switched to using pools for temporary buffers generation (there is no API to intrude original Mesh buffers)
• Currently, meshes are generated on the main thread as I don't expect a high restructuring load of primitives. But the logic of generation is thread-agnostic so it will be relatively easy to switch to the thread pool in case of a need
• For the rest of the shapes used built-in PhysX colliders
• Updated Arch so now IL2CPP will work fine with non-blittable structures (for more info check Unity support genaray/Arch#100)

Less attention:

• Introduced physics layers symmetrically to the old renderer
• Didn't take care of any raycasting components complimenting Colliders as it's out of scope of the PoC