Jetpack Boots

Adds boots that you can fly with when combined with elytra. Adds crafting recipe for "Jetpack Boots" that you can fly with. They're crafted by combining **any** Boots with Elytra in Smithing Table. That means following data will be preserved: - Enchantments - Name - Other components  ### Notes - Small bug: When upgrading Diamond Jetpack Boots to Netherite, the name will stay "Diamond Jetpack Boots"