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/water-log.model.d.ts

@@ -0,0 +1,9 @@
+import { Model } from 'sequelize-typescript';
+import { User } from './user.model';
+export declare class WaterLog extends Model {
+    UserId: number;
+    user: User;
+    date: Date;
+    amount_ml: number;
+    time: string;
+}