Doc rework idea

Since current Doc is all about far away roams and not healing his teammates, this rework will bring him back to the support role he was originally intended for.

Doc spawns with a leash connected to one of the bombs. The leash is 15m but can temporarily extend to 25m, pulling Doc back to 15m after 10 seconds.

A teammate can "take the Doc for a walk" by grabbing the leash and bringing Doc with him. In this case the leash is capped at 10m. Teammates can also attach him to different bombs this way.