[Feature ]: add a asyncHandler utility for code optimization

Introduce a reusable asyncHandler utility function to streamline error handling in asynchronous route controllers across the backend codebase. This utility will help eliminate repetitive try-catch blocks and improve code readability and maintainability.

✅ Objective:
Wrap all async controller functions using asyncHandler to automatically catch and forward errors to the error-handling middleware.

Enhance consistency and reduce boilerplate in controller files.

💡 Benefit:
Cleaner controller code.

Centralized error handling.

Easier debugging and maintenance.

@adityakalburgi plzz assign this issue to me i would like to contribute