Adds SellHelper to provide the selling methods instead of the SellGUI itself.
Moves the Sell GUI config to the guis.yml file and hooks it into the new config-based GUI system.
I'm not sure how I feel about this one to be honest.
The reason I say this is because the code feels more complicated than it needs to be, but i can't think of a better way of doing it.
I'm not sure how I feel about this one to be honest. The reason I say this is because the code feels more complicated than it needs to be, but i can't think of a better way of doing it.