feat: Add inventory management feature with CRUD operations

- Implemented inventory screen to display items with details.
- Added create, edit, and consume inventory screens for managing items.
- Introduced consumption history screen to track item usage.
- Created inventory repository and providers for API interactions.
- Enhanced routing to include inventory-related paths.
- Added necessary models for inventory items and consumption history.
- Integrated error handling and loading states for better user experience.

flutter/lib/core/ui/app_shell.dart

@@ -21,6 +21,12 @@ class AppShell extends ConsumerWidget {
       icon: Icons.restaurant_menu,
       label: 'Recept',
     ),
+    _AppDestination(
+      path: '/inventory',
+      title: 'Inventarie',
+      icon: Icons.inventory_2_outlined,
+      label: 'Inventarie',
+    ),
     _AppDestination(
       path: '/profile',
       title: 'Profil',