Allows to add overlays and underlays to the hotbar via a resourcepack.
Its config also allows to customize the color of the XP text, change its position, etc.
Fancy Hotbar in The Fungal Infection
Add textures to assets/fancy_hotbar/textures/gui/
overlay.png is the image rendered on top of the hotbar.
underlay.png is the image rendered below the hotbar.
