[MERGED PR] Adds chaplain mechanic 'faith'. Uses it for healing

[LeahTheTech]

I like the idea of encouraging people to congregate in the chapel, but a kinetic gun that regenerates bullets by magic is... weird? I dunno, it doesn't really fit the setting and on station stuff tends to be pretty grounded.
If anything, I think the faith mechanic would work better for bible healing since that's already essentially magic.