Moves var/sleeping from /mob to /mob/living/carbon.

Updates all cases where sleeping was directly set with the AdjustSleeping() and SetSleeping() procs.

Changed resting on cyborgs to put them in standby mode. Standby mode uses no power, but makes them immobile and blind.
Juggles around the cyborg UI a little bit, removing the non-functional oxygen and fire icons, and moving the cell charge indicator down a bit.

Standardises robot/life.dm, and removes process_locks() and associated vars, which date back to r2 and were unused.