Let Me Enchant

Lets bookshelves power enchanting tables through more blocks:

- ✅ Non-full blocks such as carpets, amethyst clusters, and cake - ✅ Full blocks with holes in their texture, such as copper grates - 🚫 Stairs, slabs, and similar blocks, since there is no way to determine how they are placed - 🚫 Torches, since players often use torches to block bookshelves on purpose