Peaceful Crafting

Removed recipe for shulker shells (shulkers still spawn in end cities which i did not know before updating this)

Recipe changes:

• added 2 diamond blocks to the nether star recipe to "add a bit to the challenge"
• changed 4 of the charcoal needed for the wither skulls into coal blocks as it was a bit too cheap

Added crafting recipes for:

• Rotten flesh
• Spider Eye
• Slime ball
• Bone
• String
• Gunpowder
• Blaze powder
• Blaze rod
• Ghast tear
• Nether star
• Shulker shell
• Skeleton skull
• Wither skeleton skull
• Zombie head
• Creeper head
• Piglin head