Adrenaline shot item [CR]

This PR adds an item that lets you give yourself an adrenaline surge (including the comedown afterward). It can't be used while you are on an adrenaline rush or comedown already. After use, it becomes a regular syringe.

They are very rare, found sometimes in hospitals, labs, scientist/military corpses, drug stashes, and doctor's offices, all with a rather low probability. It's supposed to be an emergency item (much like the High Adrenaline trait is), but unlike the trait it takes an action to use.

Comments appreciated on the rarity values, spawn placements, and item values (which I mostly copied from the syringe item).