What is the purpose of the `?` operator when used with `anyhow`?

The `?` operator (try operator) is used for concise error propagation. When used with a function that returns a `Result`, it automatically returns the error if the result is `Err`. When combined with `anyhow`, it simplifies error handling by automatically converting the error into an `anyhow::Error` if necessary, allowing you to propagate errors up the call stack without verbose `match` statements.