[feature] Add inventory/item manipulation.

[palmmc]

Is your feature request related to a problem? Please describe. There isn't a good way to fully manipulate item NBT in vanilla.

Describe the solution you'd like I think it would be great to have the ability to set an item's enchantments, id, etc. to values that might even lie outside of methods like Script API.

Describe alternatives you've considered You can accomplish nbt manipulation with external editors, but it'd be great if it was apart of the API, like BDSX did.

Additional context Add any other context or screenshots about the feature request here.