- Completely rewrote the entire plugin from the ground up in kotlin

What does this update introduce?
- Specify targets for stattrackers to be applicable to (eg restrict trackers to just axes)
- Added support for custom model data, item lookup support, per-tracker names and lore, recipe permissions, per-tracker descriptions, and more customization options
- Added support to have multiple stat trackers on an item at once
- Switched away from drag-and-drop in favour of a GUI holding all the trackers on an item (accessed with /stattrackers)
- Fixed EcoBosses support with bosses_killed

Items will automatically migrate to the new system, so if you have a pickaxe proudly displaying 20000 block breaks, then don't worry about it breaking with this update.