ItemCoreX 1.4 - Major Custom Item Update

Added:
True 1:1 custom item saving
Custom items now keep their original name, lore, enchantments, attributes and flags
Custom stack-size support for ItemCoreX items
Support for stack sizes beyond vanilla stack limits up to 99
To increase the stack size of a custom item, add 'stack-size: 99' to that item in customitems.yml.

Improved:
Much more reliable /ic create behavior for advanced custom items
Better support for custom weapons and attribute-based items
Stronger foundation for shops, upgrades and secure custom item progression

Fixed:
Custom items created from held items no longer lose important item data
Attribute modifiers are now saved correctly
Saved custom items now behave much closer to the original item