[CLI] Add hints and example to `hf datasets leaderboard` (#4174)
* [CLI] Add hints and example to `hf datasets leaderboard`
- Add example in --help showing how to list available leaderboards
(hf datasets ls --filter benchmark:official)
- Add hint after output to list available leaderboards
- Add hint after output to get model info for the top-ranked model
Co-authored-by: Lucain <Wauplin@users.noreply.github.com>
* for skill
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Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Lucain <Wauplin@users.noreply.github.com>