feat(qb-core): import 153 items din qs-inventory preload + fix duplicates
- Adaugat 153 iteme noi din qs-inventory preload in qb-core/shared/items.lua
- Categorii: haine, medicale, weapon tints, minerit, casino, trading cards, burger crafting, telefoane colorate
- Eliminat 19 iteme duplicate pre-existente (materiale: steel, copper, glass, plastic, rubber + cryptostick)
- Total final: 552 iteme unice, zero duplicate
- rv-maphold: HasItem foloseste QBCore.Functions.GetPlayerData() nativ
- qs-inventory mutat din [core] in [addons] (ensure dupa qb-core)
- Creat docs/qs-inventory-custom-modifications.md