+ Created common.entity.calendar.<seasonal_event> directory for special entities that spawn exclusively during season event.
+ Added lines to world/src/layer/wildlife.rs for the current events underneath nonevent basis.
+ Attempted organization go brrrrrr
+ 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)
+ add asset tests
+ migrate tundra animals
+ migrate taiga animals
+ declare temperate zone (animals yet to be created)
+ declare jungle zone (animals yet to be created)
+ declare tropical zone (animals yet to be created)
+ declare desert zone (animals yet to be created)
+ declare water (river inhabitants) zones (animals yet to be created)
