- Add hermes dashboard examples to the CLI help epilogue so users can
discover the web UI command from 'hermes --help' output
- Add an independent 'Test dashboard subcommand' CI step that verifies
'hermes dashboard --help' works in the Docker image, with its own
mkdir/chown setup to remain independent of the prior smoke test step
- Prevents regressions like #9153 where the dashboard subcommand was
present in source but missing from the published Docker image
Closes#9153