[MERGED PR] Gives medical a prepared belt.

[Ikea]

I swapped a hypospray with a syringe in the belt, and reintroduced doctor_spawn into code as a prepared first aid kit, with menders, an upgraded analyzer, a hypospray, and small beakers of epi, salbutamol and charcoal. I think that would help with the gimmick purpose of spawning in a tool that enables a generalist doctor playstyle.

Playing with a medkit in hand is a playstyle not used by most and medbay already has a lot of first aid kits lying around the place. Id be against having surgery tools spawn on doctors because it's not really something doctors need to have on them, surgery can only be done in very limited areas and said areas already have surgery tools there.