Performance update + Code optimization + 1.16.2 compatibility

I changed alot of code so there might be some bugs that we didn't know of in previous version. So I don't fully recommend using this version on public servers with lots of players. (Thats why its a beta version) But if you find any bug, error or issues. Please report it to our discord support server and we will look into it.

Fixed:

• GiveMoney command would say its disabled with default config. (Config wipe of config.yml is not needed when updating, removing the 'setmoney' command under the commands sections would causse the plugin the create the 'givemoney' command option upon reload of the plugin/server)
• Material name inside the confirmation messages when a item is bought/sold from the server or with /sellall showing now a more user friendly name.
• When a command is ran, the command syntax would return.
• Materials not working.
• Items can now have a custom displayname and custom lore and are still able to be sold.

Added:

• 1.16.2 support! Including a new mob spawner item in the default shops config with the new mob in version 1.16.2 (Piglin Brute)
• The items that are bought from the shop will now respect the max stack size of the item.
• Some missing languages in the language files.

Removed:

• Music discs, Potions and Enchanted items would have an extra lore showing the enchantment/potion/music disc name that minecraft gives to them.

Optimized:

• Performance on startup, when a messaga is send to the players chat/console/..., when a spawner is mined, loading all items in the GUI and in general when someone is using the shop and clicking items.
• Updated all NMS code.
• Deleted redundant code.