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/app.controller.d.ts

@@ -0,0 +1,12 @@
+import { Response } from 'express';
+import { UsersService } from './users/users.service';
+export declare class AppController {
+    private usersService;
+    constructor(usersService: UsersService);
+    root(req: any, res: Response): void;
+    login(): {};
+    loginPost(res: Response): void;
+    register(): {};
+    registerPost(body: any, res: Response, req: any): Promise<void>;
+    logout(req: any, res: Response): void;
+}