1- Added refund for unsellable and blacklisted items.
2- /donutworth gui command added, here you can visually see the items and add or delete them from the blacklist, in addition you can change their prices
3- Calculation has come with the value of the items in the Shulker box.
4- Support for enchants has come, you can edit it from the bottom of config.yml, the value increases by multiplying at each enchant level.