Keep inventory nerf

This datapack nerfs the keep_inventory gamerule by damaging armor and tools and taking valuable items on death.

items that can be taken are: - diamonds - iron, gold and copper ingots - raw iron, gold and copper - emeralds - experience bottles - amethyst shards - iron and gold blocks - redstone and redstone blocks - bread - cookies - all cooked meat - baked potatoes - golden carrots and apples