LaxBOOM: Explosive arrows and fire charge launcher

Simple datapack to include explosive arrows and fireball launcher. Simply fire an arrow to see the effects!

You can get a special crossbot with preset enchantments (multishot and quick charge 10) with this command:

`/function laxboom:get_launcher`

Plus, by holding a fire charge in your main hand, you will start firing fire charges!

⚠️ Warning: This DataPack also kills every dropped item each tick

See demonstration here: https://youtu.be/SnThaawc6Pk

Took inspiration from https://modrinth.com/datapack/explosivearrows