text: Title: Add examples for response & error handling
  Body: We should add examples on how to write response and error handlers using `response_handler` and `error_handler`. Checkout [this guide](https://uplink.readthedocs.io/en/stable/user/quickstart.html#response-and-error-handling) for a quick overview of these decorators.
  
  These examples should reside under the [`examples`](https://github.com/prkumar/uplink/tree/master/examples) directory.