EntityJS

Added .createNavigation override to mob, animal, and tamable mob builders

Added .addPartEntity parameter effectively adding part entity/multi-hitbox support

Added .onPartHurt function to the part entity builder

Added missing brain overrides for living entity/pathfinder mob/tamable mob builders

Added EntityJSUtils binding for various class uses

Removed InteractionResult binding as it's no longer needed in the .onInteract method in the builders as .onInteract needs no return value anymore

Changed "targetEntity" context to "entity" in .isInvulnerableTo method