Implement Centralized Error Handling for Unhandled Exceptions

[nixhantb]

Description:

Implement a centralized error handling mechanism using middleware to catch and handle unhandled exceptions globally across the application.

Current Behavior:
Unhandled exceptions are causing 500 errors without providing meaningful error messages to the user.

Expected Behavior:
All unhandled exceptions should be caught by the centralized error handling middleware, logging the error details and returning a consistent error response to the client.

Proposed Solution:

1. Implement a centralized error handling middleware to catch all unhandled exceptions.
2. Log the error details.
3. Return a consistent and meaningful error response to the client.