Repair recipes and don't suggest items with nbt tags as ingredients

This fixes a bug when renamed items were suggested as ingredients for the new recipe types.

Also, this adds item repairs - if you have two tools or armor pieces of the same type, both damaged, you'll get the option of combining them to repair them.

This new option will only consider unenchanted items, so there's no risk of combining your eff5-unb3-mending-silk touch pick with your eff5-unb3-mending-fortune3 pick into a shiny, but unenchanted, pick.

However, you might have a skeleton grinder that provides you with lots of damaged bows, some of them enchanted with something stupid like unbreaking 1. To allow you combining those with just one click, there's a new option for the maximum number of enchantments an item may have for repairs. You can set this to one to allow combining items that have one enchantment, still leaving your 4-enchantment picks alone. Use with caution.