Added new sections Purchase-item, Prices and Purchase-permission to configure a price to the tags on your placeholders. More information can be found on the wikipedia (Coming soon) or on the new default file ExamplePlaceholderEmoji.yml
Added new button on inventory_tags_manage.yml which allows to modify the economy settings through GUI.
Added new interaction on inventory_tags_list.yml, where players will get a new inventory open (inventory_tags_purchase.yml) which allows to select an economy to use to purchase this tags. If there's only one economy applied on the tag, this economy will be used by default directly.