Feat: Archipelago Gifting API

[LelouBil]

This PR adds :

• Kotlin setup for the repository using kotlin for forge
• Code that implements the Archipelago Gifting API

The gifting system is made in a generic way, using minecraft datapack registries for trait assignments (so it's easy to change via datapack if something is overpowered or simply wrong).

To use, simply do the /gift command which will gift the item currently in your hand to the AP slot specified in the argument

It's a draft because there is still some stuff to clean up/polish, namely :

• Gift handing when the player's inventory is full, or when they are dead
• Choose which player on the server receives a gift
• Add data maps for Potion effects and for enchantments traits attribution
• Handle wood types
• Add configuration values for some behavior (like adding "Damage" gift tag if an armor has the Thorns enchantment)

[DDR-Khat]

@LelouBil
Rather than assuming the item in the player's hand. Maybe send a Inventory screen packet to the player (Dropper/Chest) which the player can put items into. And upon closing it, it gifts all items submitted via that container?
Similar to how Fabric server mods (I know this isn't a fabric implementation) like those made by "Patbox" or your typical "Auction" or "Trade" spigot/bukkit derivative plugins do it.