guard room chair lets you get stuck and die

[Menacing]

Updated falling state to allow you to move laterally.

Updated fall damage to use real velocity, not the pseudo timer variable

TODO:

• [x] Add stuck state
• [x] Add stuck message and keybind
• [x] Add Unstuck navigation region
• [x] When stuck and message displays, press unstuck key to teleport to nearest point on the unstuck nav region
• [x] Move offending chair
• [x] Validate roombas still work

[Menacing]

Godot 4.4 might include a better solution for multiple nav regions

https://github.com/godotengine/godot-proposals/issues/5542

Otherwise we're supposed to do this:

https://docs.godotengine.org/en/latest/tutorials/navigation/navigation_different_actor_types.html