* Add --fail-fast CLI flag to stop after first hook failure
- Add fail_fast field to RunArgs struct with CLI flag support
- Fix in hook_impl.rs where fail_fast was hardcoded to false
- Update run() and run_hooks() to accept and propagate fail_fast parameter
- CLI flag overrides config file setting (enables fail-fast mode)
- Ensure try-repo and main entry point pass fail_fast correctly
* Update test snapshots for --fail-fast flag
* Add CLI flag test for --fail-fast
* Fix trailing whitespace in test comment
* Show error message in quiet mode
In quiet mode (`-q`), error messages will still be printed.
In silent mode (`-qq`), nothing gets printed.
* Generate cli doc
* Add test
