[Feature]New atmos/various states emergency energy shield

[ZeWaka]

Aw dang, been hearing about this.

I thought that the best place would be in the canPass proc in /obj/forcefield/energyshield. The if statement checks the power level and decides whether to let mobs pass or not.

yeah write something that might not compile or whatever but would where i would put the obj/liquid or whatever it is thing