Barely Default Data Pack

Added some new content and caught up to some tweaks and minor errors:

• Added data driven mobs to the nostalgia hills biome
  • Nostalgic chicken: lays "eggs"
  • Nostalgic pig
• Added new food items (obtained from cooking, campfire cooking or smelting)
  • Roasted Spruce Cone
  • Roasted Birch Catkin
  • Roasted Jungle Seed
  • Roasted Pumpkin Seeds
• Cleaned up the loot table folders
  • Made each individual butterfly obtainable through loot commands
  • Removed unused fish
• Common, uncommon and rare fish are now visible in the fishing advancement tab. Epic fish are given the challenge icon frame and remain hidden until caught
• Biomes now have water and water fog colors that match Minecraft Bedrock biomes
• Wardens have a 50% chance of dropping the "Hug The Warden" music disc; creepers no longer drop them when killed by a skeleton
• A new music disc, "Creator (Rap)", can be crafted using a creator music disc and blaze powder, emits a redstone signal of 11
• Removed a duplicate bonemeal recipe
• Removed the bubble pop particle from biomes that had fireflies at night
• Fixed stonecutter recipes not italicizing output items
• Fixed the echo shard trim not working and added the poisonous potato as a new trim material