VIP Plugins AdvancedKits 1.21.19

✦ Changes:
● Updated all libraries to their latest versions.
● Fixed an issue where users were disconnecting before the database was fully loaded.
● Recoded and cleaned up the kit levels, kit manager, and kit events.
● Added the ability to get a Kit from KitLevel to the API.

✦ Changes:
● Updated all libraries to their latest versions.
● Enhanced collection performance and implemented additional optimizations.
● Implemented synchronized locks for asynchronous tasks to ensure proper synchronization and thread safety.

✦ Changes:
● Fixed a few issues from the previous update.
● Optimized ranged slots and available slots of menu fillers.
● Fixed an issue with kit status when the player is not online.

✦ Changes:
● Updated all libraries to the latest version.
● Fixed an issue with double plugin hooking.
● Optimized item hooks to get faster the item.
● Added categories on plugin hooks.

✦ Changes:
● Updated all libraries to the latest version.
● Added %advancedkits_total_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_available_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_unavailable_kits_<category>% PlaceholderAPI placeholder.
● Added %advancedkits_locked_kits_<category>%...

✦ Changes:
● Updated all libraries to the latest version.
● Allows all PlaceholderAPI placeholders on menu filler items.
● Now the refresh delay of menus will be applied to active menu fillers.
● Added caching for current items on menu fillers.