--- 'pnpm': minor --- Implement `pnpm ci` command for clean installs [#6100](https://github.com/pnpm/pnpm/issues/6100). The command runs `pnpm clean` followed by `pnpm install --frozen-lockfile`. Designed for CI/CD environments where reproducible builds are critical. Aliases: `pnpm clean-install`, `pnpm ic`, `pnpm install-clean`