Refactored the inventory code for adding items, fixed some bugs related to marking items as stolen.

Fixed a bug where arrows couldnt be marked as stolen

Refactored the code in the ChoosebestArmor function in the bp ai parent

Refactored the code in the SetArmorEquipped function in the BTGS inventory component

Fixed a bug where the material on the NPC underwear models would have the material of whatever they were previously wearing

Refactored the code in the PlayerInventoryMaintenance function

Refactored the code in the NPCInventoryMaintenance function

Removed a bunch of hard refs in various components