Itemstack Glint API

[Machine-Maker]

Closes #5274

First time touching item meta stuff

Unsure of a few things, mainly the behavior of this elsewhere in the codebase, like anvils/grindstones. Currently you can remove the glint with the grindstone (and get no xp), and you can put enchanted books on the item, BUT that removes the empty NBTTagCompound, so removing that enchant will make the item lose it's glint.

Issue relating to this: #5723