* add `#[derive(FromRef)]`
* tests
* don't support skipping fields
probably wouldn't work at all since the whole state likely needs `Clone`
* UI tests
* changelog
* changelog link
* revert hello-world example, used for testing
* Re-export `#[derive(FromRef)]`
* Don't need to return `Result`
* use `collect` instead of quoting the iterator
* Mention it in axum's changelog
