v0.2.1

Added

• Smarter onboarding when no backend is available. Generic "no conversion backend" error replaced (well, supplemented — the original message stays as the first line so existing parsers don't break) with a platform-specific recommendation and per-backend install commands printed inline. If Docker is detected, leads with the one-line docker run gotenberg/gotenberg:8 path so the user doesn't need to install LibreOffice (~700MB) at all.
• --doctor JSON enriched with actionable setup data:
  • platform (darwin / linux / win32) and platformKey (linux-apt, linux-dnf, etc.)
  • tools.docker, tools.unzip, tools.fcList (in addition to existing tool flags, all preserved at the top level for backwards compat)
  • backends[name] object with available, fidelity, reason, and install (platform-specific install command)
  • top-level recommendation field — single best next step for this host (Docker-Gotenberg if Docker is installed, else LibreOffice)
• CliError now carries an optional kind property (e.g. "NO_BACKEND") so library callers can branch on error type instead of error-message text.
• AGENTS.md extended with a setup-recipe section covering the JSON shape, the discovery-then-install flow, the consent prompt pattern, and a clean-up note for Docker-started Gotenberg containers.

Changed

• commandExists switched from sh -lc to sh -c. The login shell was reading user shell-init files and rebuilding PATH, sometimes returning probes for commands that spawn() itself couldn't actually find (e.g. when a parent process had cleared PATH).