Allow the grindstone to extract and transfer enchantments between items and books.
From Enchanted Items → Enchanted Book
Place an enchanted item + a book into the grindstone to extract its enchantments into an enchanted book.
From Enchanted Book → New Enchanted Book
If the input is an enchanted book, the grindstone extracts the topmost enchantment and transfers it to another book.
Supports Tax Free Levels
