feat: add meal planning feature with API integration

- Introduced MealPlanApiPaths for handling meal plan related API endpoints.
- Added MealPlanScreen for displaying and managing meal plans.
- Implemented MealPlanRepository for fetching and updating meal plan data.
- Created data models: MealPlanEntry, MealPlanRecipe, InventoryCompareItem, ShoppingItem, and MealPlanDashboard.
- Integrated meal plan functionality into the app router and UI.
- Updated localization files for meal plan related strings in English and Swedish.
- Added state management for meal plan using Riverpod.

flutter/lib/features/meal_plan/domain/meal_plan_recipe.dart

@@ -0,0 +1,31 @@
+class MealPlanRecipe {
+  final int id;
+  final String title;
+  final String? imageUrl;
+  final int? servings;
+
+  const MealPlanRecipe({
+    required this.id,
+    required this.title,
+    this.imageUrl,
+    this.servings,
+  });
+
+  factory MealPlanRecipe.fromJson(Map<String, dynamic> json) {
+    final rawId = json['id'];
+    final rawTitle = json['title'] ?? json['name'];
+    final rawServings = json['servings'];
+    final rawImageUrl = json['imageUrl']?.toString().trim();
+
+    return MealPlanRecipe(
+      id: rawId is num ? rawId.toInt() : int.parse(rawId.toString()),
+      title: (rawTitle ?? '').toString(),
+      imageUrl: rawImageUrl == null || rawImageUrl.isEmpty ? null : rawImageUrl,
+      servings: rawServings == null
+          ? null
+          : rawServings is num
+              ? rawServings.toInt()
+              : int.tryParse(rawServings.toString()),
+    );
+  }
+}