Tweaked pack-in content to prevent checksum errors

Fixed some issues caused by an idiot making major changes to a map past 3AM after a powernap that started at lunchtime

-Reworked vents
-Extended playable area while remaining faithful to real life
-Added another printer

Fixed some visible nodraw textures

-Clipped a spot players could fall into and get softlocked in by the safe
-Made the vent exit a lot smaller
-Fixed navmesh

-Added navmesh