[game] edge grab, small fixes, add zoomer

[water111]

• start trying to understand joint stuff
• add a process-drawable function related to joint stuff. Now you don't get stuck swim jumping, and the joint animation channels look correct.
• add edge grab. It edge grabs from the feet, not the hands, because we don't have bones.
• add warp gate to the list of things we spawn. Actually using the warp gate is a crash, but you can at least go through the menu
• add zoomer and some missing racer stuff. The HUD is buggy and I suspect a memory bug - it also doesn't interact with the pause menu correctly (there's a ~3s delay to open it) and the pause menu animation looks wrong.
• increase stack size for eco pill so it no longer crashes