Room-scale locomotion must be handled.

[ThomasMountainborn]

Right now, room scale locomotion isn't taken into account. Physically moving around the room doesn't move the player capsule. Also, sticking your head into a mesh just clips the camera through the mesh.

Proposed solution:

• A smarter character controller that takes both artificial and physical locomotion into account in moving the capsule collider.
• A collision check for the head to fade out the view when colliding with an obstacle, while still allowing the player to lean over low obstacles like railings.
• Also fix moving down slopes