Skeleton Ruins

Adds different types of skeletons like a shield skeleton which is a skeleton who has more defence because of its shield and would attack you with a sword, thrower skeleton which throws a skeleton skull on fire at nearby players, a skeleton golem or bone golem which would be found in ruins where these skeleton types would be found. Would be like a normal iron golem but a skeleton, defends skeleton types but can also be passive if created by a player and if the player is wearing a skeleton head. Ruins would be areas that are on the surface but go into the ground. It would have traps, skeleton types and loot. There would also be a few new items and an update to the skeleton head which if yoy were to wear it all skeletons would be passive to you unless you take it off or attack them. I'm going to keep it at this but will add more to this when I have more ideas to add to it. I want to call this the skeleton army update, skeleton ruins or Boney ruins update.