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/local-auth.guard.d.ts

@@ -0,0 +1,6 @@
+import { ExecutionContext } from '@nestjs/common';
+declare const LocalAuthGuard_base: import("@nestjs/passport").Type<import("@nestjs/passport").IAuthGuard>;
+export declare class LocalAuthGuard extends LocalAuthGuard_base {
+    canActivate(context: ExecutionContext): Promise<boolean>;
+}
+export {};