Minor Update: Plugs and IND

Patchnotes:
Started "I'm not dead" series of posts in the discord server.
IND Summary: Not been as productive as I'd like, but next update should have fluids+new creatures.

Stopped the player from being locked in a walk animation when interacting with the reactor.
Created the barebones for an auxiliary animation system, for actions like inputting/retrieving plugs.

Arms:
Fixed the arm teleporting back into position, when blocking a body part.
Fixed the arm vibrating awkwardly, multiple times, in multiple ways, over multiple days.
Fixed the arm vibrating during the 'hoodie' walkcycle.
Rewrote arm code to account for custom arm dimensions, like are present in suit.
Fixed suit's mouth-covering posture.
Fixed some cases of the arm becoming unruly when the hand is close to the shoulder.
Disabled interactions with more than one arm at once, to prevent cramping and animation glitches.
Fixed a minor glitch where Mel wouldn't put on both gloves in 'suit', until the player clicked the mouse.
Developed a new hatred for the arm-spaghetti code.

"Friends":
Added a speed limit, punishable by law.
'Friends' will now wriggle into place when grabbed and stuffed into an orifice.
Removed one instance of ghost 'friends'. Souls should not be collected separately.
'Friends' will not jump at a blocked orifice.

Plugs:
Added plugs, a hands-free method to keep the in-things in, and the out-things out!
This is managed through a new menu on the bottom left.
Used plugs will always block 'friends' from exiting through that orifice.
1-Way plugs will allow 'friends' to enter through a plugged orifice- now enabling more of a 'hoovering' style of play.