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/utils/utils.service.d.ts

@@ -0,0 +1,54 @@
+import { User } from '../models/user.model';
+import { FoodItem } from '../models/food-item.model';
+import { Meal } from '../models/meal.model';
+import { WaterLog } from '../models/water-log.model';
+import { WeightLog } from '../models/weight-log.model';
+import { MealPlan } from '../models/meal-plan.model';
+import { PlannedFood } from '../models/planned-food.model';
+import { DailySummary } from '../models/daily-summary.model';
+export declare class UtilsService {
+    private userModel;
+    private foodItemModel;
+    private mealModel;
+    private waterLogModel;
+    private weightLogModel;
+    private mealPlanModel;
+    private plannedFoodModel;
+    private dailySummaryModel;
+    constructor(userModel: typeof User, foodItemModel: typeof FoodItem, mealModel: typeof Meal, waterLogModel: typeof WaterLog, weightLogModel: typeof WeightLog, mealPlanModel: typeof MealPlan, plannedFoodModel: typeof PlannedFood, dailySummaryModel: typeof DailySummary);
+    calculateBMR(weightKg: number, heightCm: number, age: number, gender: string): number;
+    calculateTDEE(bmr: number, activityLevel: string): number;
+    calculateMacroTargets(weightKg: number, goalType?: string): {
+        protein_g: number;
+        carbs_g: number;
+        fat_g: number;
+    };
+    calculateDailyTotals(userId: number, targetDate?: string | Date): Promise<{
+        calories: number;
+        protein: number;
+        carbs: number;
+        fat: number;
+        meals: any[];
+    }>;
+    calculateWaterTotal(userId: number, targetDate?: string | Date): Promise<{
+        total_ml: number;
+        logs: {
+            id: any;
+            amount_ml: number;
+            time: string;
+        }[];
+    }>;
+    getWeightTrend(userId: number, days?: number): Promise<{
+        date: Date;
+        weight_kg: number;
+    }[]>;
+    getCalorieTrend(userId: number, days?: number): Promise<any[]>;
+    updateDailySummary(userId: number, targetDate?: string | Date): Promise<DailySummary>;
+    getMacroPercentages(proteinG: number, carbsG: number, fatG: number): {
+        protein: number;
+        carbs: number;
+        fat: number;
+    };
+    suggestFoodsForMacros(remainingProtein: number, remainingCarbs: number, remainingFat: number): any[];
+    generateDailyMealPlan(userId: number, dateStr: string): Promise<boolean>;
+}