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/planned-food.model.d.ts

@@ -0,0 +1,10 @@
+import { Model } from 'sequelize-typescript';
+import { MealPlan } from './meal-plan.model';
+import { FoodItem } from './food-item.model';
+export declare class PlannedFood extends Model {
+    MealPlanId: number;
+    mealPlan: MealPlan;
+    FoodItemId: number;
+    foodItem: FoodItem;
+    quantity: number;
+}