Start development of the zShop V3 plugin using the zMenu API:

- Change: Allow inventories without items
- Add %player% with papi utils
- Add getter for MetaUpdater in InventoryManager
- Add method getCurrentPlayerInventory in InventoryManager
- Add method buildDisplayName in Button
- Add method buildLore in Button
- Add updateOnClick option, update button if player click on another button
- Add button listener method in InventoryManager
- Add check for new messages value saving
- Fix placeholder verification
- Fix patterns interactions
- Fix itemstack amount with custom material
- Fix item lore with lore is empty
- Fix message translation for hex color
- Fix Component meta regex (you can now use the mini message <gradient>)