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/auth/guards/authenticated.guard.d.ts

@@ -0,0 +1,4 @@
+import { CanActivate, ExecutionContext } from '@nestjs/common';
+export declare class AuthenticatedGuard implements CanActivate {
+    canActivate(context: ExecutionContext): Promise<any>;
+}