More Chiseled Bookshelf Variants

1.6.1:

• Fixed the recipes incorrectly using slabs and books as ingredients, they now use planks and slabs just like their vanilla counterpart
• The recipes are now also grouped so that they only take up a combined 1 extra space in the recipe book
• (1.21, 1.21.1) Fixed the chiseled bookshelves not properly dropping themselves when mined