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/features/inventory/data/inventory_providers.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/api/api_providers.dart';
+import '../../../core/api/guarded_api_call.dart';
+import '../../auth/data/auth_providers.dart';
+import '../domain/inventory_item.dart';
+import '../domain/inventory_consumption.dart';
+import 'inventory_repository.dart';
+
+final inventoryRepositoryProvider = Provider<InventoryRepository>((ref) {
+  return InventoryRepository(ref.watch(apiClientProvider));
+});
+
+final inventoryProvider = FutureProvider<List<InventoryItem>>((ref) async {
+  final token = await ref.watch(authStateProvider.future);
+  return guardedApiCall(
+    ref,
+    () => ref.read(inventoryRepositoryProvider).fetchInventory(token: token),
+  );
+});
+
+final inventoryDetailProvider =
+    FutureProvider.family<InventoryItem, int>((ref, id) async {
+  final token = await ref.watch(authStateProvider.future);
+  return guardedApiCall(
+    ref,
+    () => ref.read(inventoryRepositoryProvider).fetchInventoryItem(id, token: token),
+  );
+});
+
+final consumptionHistoryProvider =
+    FutureProvider.family<List<InventoryConsumption>, int>((ref, id) async {
+  final token = await ref.watch(authStateProvider.future);
+  return guardedApiCall(
+    ref,
+    () => ref
+        .read(inventoryRepositoryProvider)
+        .fetchConsumptionHistory(id, token: token),
+  );
+});