[MDB Ignore] Readds le cryo sleeper for le despawning and le latejoining

[MrMelbert]

Wow it only took me two years to get around to it again
(In actuality I just implemented these for my event code and figured plugging them in would be relatively painless)

• Kilo, Pubby, and Lima now have a set of cryo sleepers in or near dorms which induce stasis.
  • You can use them to AFK without worrying about starving.
  • They block radio use and force you to whisper while inside, to discourage their use in medical emergencies.
  • Permabrig also has one or two cryo sleepers for prisoner use.
• Entering one throws a screen alert that you can click to despawn your character (with a confirmation prompt)
• There's a new character preference that allows you to prefer to latejoin via a cryogenic sleeper instead of the arrivals shuttle. You still default to arrivals if all sleepers are occupied or the map has none.
  • Latejoining prisoners will spawn in the permabrig cryo sleepers as you would expect.
  • At some point this might go away if we decide to revamp the arrival process entirely.
    • For instance, we may want to get rid of arrivals wholesale and have everyone wake up in cryo, even from roundstart.
    • Alternatively, we may ditch cryo spawning and have everyone spawn on centcom to ferry to the station.
    • Or some radical third option like the gateway, Idk. It all depends on LORE and background and setting.
• I didn't map it onto all the base maps (yet)
• Also grabs clickable alert glow