Ports /tg/ camera lights improvement!

- Ports https://github.com/tgstation/-tg-station/pull/4162, credit to Kelenius.
- When the AI activates camera lights, all cameras in range of the eye
will activate their lights, and deactivate once the eye moves away.

This has the side effect of providing warning to anyone in a dimly lit area that the AI is watching. (Pssst! Traitors, hide your e-swords!)

- Toned down the lighting intensity a little (one level above /tg/, one
level below previous) to compensate.