feat(inventory): add InventorySubject enum and integrate into catalog item management

app/Domains/Catalog/Resources/CatalogItemDetailResource.php

@@ -33,6 +33,7 @@ class CatalogItemDetailResource extends JsonResource
             'category' => $this->category?->nombre,
             'brand' => $this->brand?->nombre,
             'inventory_policy' => $this->inventory_policy?->value,
+            'inventory_subject' => $this->inventory_subject->value,
             'max_units_per_user' => $this->max_units_per_user,
             'has_tickets' => $this->has_tickets,
             'ticket_generation_policy' => $this->ticket_generation_policy->value,