Create: structures overhaul

RELEASE!!!

   Loot

• Loot is now available in every structure. Loot generation is randomized and includes Create items. My mod uses unique loot tables.

   Generation

• Improved placement type for more balanced structure generation.
• Increased filler system, so structures now have a smaller chance to spawn. This change makes structure generation more balanced.

   Structures

• Added chests and barrels filled with randomized loot in every structure.
• Trapdoors in windmills now match the tree type and biome.
• Fixed broken glass at the top of the greenhouse.

   Fixes

• Fixed namespace issues.

Ports for Forge and NeoForge are here!