add-cli-command

# Add a CLI command Paths are relative to `crates/clickhousectl/`. 1. Follow the procedure for the kind of command: - Local (`local ...`, runs on this machine): [references/local.md](references/local.md) - Cloud (`cloud ...`, calls the Cloud API): [references/cloud.md](references/cloud.md) 2. Write help text with the `cli-help-text` skill (`.agents/skills/cli-help-text/SKILL.md`). 3. Finish with the steps below. ## Finish - Add `Cli::try_parse_from` tests next to the clap definition for each new flag. Check the parsed value, the default, whether it can repeat, and any conflicts with other flags. - For each new source or test file, add an entry to both `scripts/classify-cloud-integration.py` and `scripts/classify-install-integration.py`. CI fails on a file that is in neither. - Update the relevant user guide or reference under `docs/` when users will see the change, following `CONTRIBUTING.md`. Keep safety and behavioral details beside the affected task. Change the root `README.md` only when its capability overview or representative examples need updating; do not add a flag catalog. - Check documentation links/anchors and example commands against this branch's help and request definitions. - Run the CLI commands from "Commands" in the root `AGENTS.md`. Both clippy configurations must pass. Copy this checklist and tick it off as you go: ``` - [ ] Procedure steps (local.md or cloud.md) - [ ] Help text follows the cli-help-text skill - [ ] try_parse_from tests for new flags - [ ] Both classifiers map new files - [ ] Relevant guide/reference and any affected README example - [ ] Documentation links and command examples checked - [ ] fmt, both clippy configurations, tests ```