Order - Shulker Support & Admin GUI v2.2.1

1. Fixed the error because of using dependency util class that's not imported by mistake.

1. Added the ability to remove custom items without config modifications.
2. Fixed the negative bug.

1. Added world blacklist, not being able to use orders in a specific world. (Suggested by TheWixaj)
2. Fixed a deliverying bug (would suggest updating)

1. Fixed not loading the configurations correctly on startup.

1. Fixed the issue with random skins in GUI.
2. Changed the dupe safety checks from using custom model data to persistent data.
3. Added support for potions for older versions such as 1.21.4 for those who are still behind in updates.

1. Added the option to add a skull in inventories, supporting uuid, name, url or base64.
2. Added a read-me txt showing a few tutorials.

1. Added super extra security ensuring items cannot be taken outside inventory.
2. Fixed the cancel problem with MySQL.
3. Added an option to disable the sell feature, by setting the priority shop in config to "none".
4. Made it so you can change slots in the collect menu.

1. Fixed the bug where you can cancel unlimited times.