build: add TypeScript configuration and generate declaration files

- Add tsconfig.json for TypeScript compilation with declaration and source map generation
- Generate .d.ts declaration files for all modules, services, controllers, and models
- Update package.json with NestJS dependencies and TypeScript development tools
- Include database files in the distribution output for persistence

dist/meal-planner/meal-planner.service.d.ts

@@ -0,0 +1,19 @@
+import { MealPlan } from '../models/meal-plan.model';
+import { PlannedFood } from '../models/planned-food.model';
+import { FoodItem } from '../models/food-item.model';
+import { UtilsService } from '../utils/utils.service';
+export declare class MealPlannerService {
+    private mealPlanModel;
+    private plannedFoodModel;
+    private foodItemModel;
+    private utilsService;
+    constructor(mealPlanModel: typeof MealPlan, plannedFoodModel: typeof PlannedFood, foodItemModel: typeof FoodItem, utilsService: UtilsService);
+    getWeeklyMealPlans(userId: number): Promise<{
+        dates: any[];
+        mealPlans: {};
+        today: string;
+    }>;
+    autoGenerate(userId: number, date: string): Promise<boolean>;
+    addMealPlan(userId: number, data: any): Promise<MealPlan>;
+    toggleComplete(userId: number, planId: number): Promise<MealPlan>;
+}