Fixes, fixes and fixes

Fixed

• Fix a bug where certain users couldn't start the plugin to an issue with vault
• Fix bug where users could still buy items even if their inventories were full
• Make it so that a user can't buy from shop if available inventory space is less than shop quantity
• Remove that spooky ghost that would make items float away on top slabs

Added

• Added new config variable for how to display hoveritems (itemdisplay)
  • Set it to either Quantity (The amount the shop sells) or Full (A full stack of 64 items)
• Added a new language node for when a user doesn't have enough inventory space to buy from a shop