- Introduced `consumables` field in `ServiceItem` to allow multiple individual items alongside inventory packages.
- Created `ServiceItemConsumable` entity to manage individual consumable items linked to a service.
- Updated `ServiceItemController` to handle CRUD operations for consumables.
- Enhanced `ServiceDetailPage` and `ServiceItemFormModal` to display and manage consumables.
- Added tests to ensure functionality for adding, updating, and validating consumables.
- Updated API documentation to reflect changes in service item structure and consumables.
