Add a new light pet (Copp-o’-lantern)

I believe that at the moment there aren’t very many uses for copper in survival mode. Because of that, a new pet could be added that could bring more fun into cave exploration. Copp-o’-lantern will be a new type of golem that can be created using 6 blocks of copper and a glowing pumpking at the top. When summoned, this golem will hover above the ground (like a blaze, with 4 arms working like wings) and light player’s way. When player is in a dark cave and a skeleton attacks him, this golem will rush and stand next to the player in order to protect him. When low on health, this golem will shrink its wings and hide behind player. Copp-o’-lantern can be healed with copper ingots. When the player flies fast using elytra, this golem will charge and increase its speed in order to keep up with the flying player.