+ Made yeti boss have a 5% chance to spawn in snow biomes.
+ New yeti entity has ~28.5% chance to drop 1 to 10 exclusive blue cheese, ~57.1% to drop 1 to 3 coal, and ~14.2% chance to drop 1 diamond.
+ Blue cheese heals 60hp over 20 seconds.
+Blue cheese has item_image_manifest and other necessities completed. (Model is current placeholder until Gemu or Hannibal have approved)
