[Feature] Easy importing of colliders from glTF files

[kanerogers]

Background

One of the most time consuming tasks when working on Hotham games is configuring collider geometry. This issue is a first past attempt at resolving that problem.

TODO

• When importing meshes, check for _HOTHAM_COLLIDER_WALL or _HOTHAM_COLLIDER_SENSOR suffixes
• For WALL meshes, create a collider and attach it to the corresponding entity
• For SENSOR meshes, create a collider and mark it as a sensor