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/models/user.model.d.ts

@@ -0,0 +1,26 @@
+import { Model } from 'sequelize-typescript';
+import { Meal } from './meal.model';
+import { WeightLog } from './weight-log.model';
+import { WaterLog } from './water-log.model';
+import { MealPlan } from './meal-plan.model';
+import { UserGoal } from './user-goal.model';
+import { DailySummary } from './daily-summary.model';
+export declare class User extends Model {
+    username: string;
+    password: string;
+    name: string;
+    age: number;
+    gender: string;
+    height_cm: number;
+    weight_kg: number;
+    activity_level: string;
+    target_daily_calories: number;
+    meals: Meal[];
+    weightLogs: WeightLog[];
+    waterLogs: WaterLog[];
+    mealPlans: MealPlan[];
+    goal: UserGoal;
+    dailySummaries: DailySummary[];
+    validPassword(password: string): boolean;
+    static hashPassword(user: User): Promise<void>;
+}