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/meals/meals.controller.d.ts

@@ -0,0 +1,32 @@
+import { Response } from 'express';
+import { UtilsService } from '../utils/utils.service';
+import { NutritionService } from './nutrition.service';
+import { Meal } from '../models/meal.model';
+import { MealFood } from '../models/meal-food.model';
+import { FoodItem } from '../models/food-item.model';
+import { WaterLog } from '../models/water-log.model';
+import { WeightLog } from '../models/weight-log.model';
+export declare class MealsController {
+    private utilsService;
+    private nutritionService;
+    private mealModel;
+    private mealFoodModel;
+    private foodItemModel;
+    private waterLogModel;
+    private weightLogModel;
+    constructor(utilsService: UtilsService, nutritionService: NutritionService, mealModel: typeof Meal, mealFoodModel: typeof MealFood, foodItemModel: typeof FoodItem, waterLogModel: typeof WaterLog, weightLogModel: typeof WeightLog);
+    addMealPage(req: any, res: Response): void;
+    addMeal(req: any, res: Response, body: any): Promise<void>;
+    searchFood(query: string): Promise<any[]>;
+    addFood(body: any): Promise<{
+        success: boolean;
+        food_id: any;
+        name: string;
+    } | {
+        success: boolean;
+        food_id?: undefined;
+        name?: undefined;
+    }>;
+    addWater(req: any, res: Response, body: any): Promise<void>;
+    addWeight(req: any, res: Response, body: any): Promise<void>;
+}