Add 2 new roles: doctor and alpha wolf

Doctor is on the village team, and has a number of immunizations they can give out during the day. An immunized lycan reverts a normal villager, and anyone that is immunized will die instead of turning into a wolf if they are bitten by the alpha wolf. Beware, however, because attempting to immunize someone already bitten will simply speed up the process of them becoming a wolf!

Alpha wolf has a once-per-game ability where they can bite the wolves' target instead of killing them following the death of a werewolf during the day. The bitten person will subsequently turn into a wolf in 3 nights. For each wolf that dies during the transformation period, the timer is reduced by 1 night.