Show only first example per command in group-level CLI help (#3841)
When displaying --help for a command group (e.g., 'hf buckets --help'),
show only the first example from each subcommand to keep the output
concise. Full examples are still shown when viewing help for individual
subcommands (e.g., 'hf buckets sync --help').
This reduces verbosity in the top-level help output while maintaining
comprehensive examples at the subcommand level.
Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Lucain <Wauplin@users.noreply.github.com>