Add Homebrew package intelligence CLI

Goal

Add a Printing Press CLI for Homebrew formula/cask intelligence.

Free source

• Homebrew formula/cask JSON APIs.
• Homebrew analytics endpoints where appropriate.

Agent jobs

• Pick the right package/cask to install.
• Check popularity, dependencies, install names, and freshness.
• Explain formula changes or cask migration issues.
• Compare alternatives before recommending an install command.

Proposed command shape

• homebrew-intel-pp-cli formula ripgrep --agent
• homebrew-intel-pp-cli cask cursor --agent
• homebrew-intel-pp-cli search postgres --agent
• homebrew-intel-pp-cli analytics wget --agent
• homebrew-intel-pp-cli compare fd ripgrep ag --agent

Non-goals

No install/uninstall/update operations. This should be read-only package intelligence.\n\n## Implementation path\n\nThis is a new CLI candidate, so do not hand-build it directly in this published library repo. Run it through the canonical Printing Press generation flow in cli-printing-press, keep manuscripts/proofs, then publish into this repo with the publish flow.\n\n## Acceptance criteria\n\n- Research notes explain the source/API/feed contract, rate limits, auth needs, and freshness behavior.\n- CLI exposes a small agent-native command set, not a raw endpoint dump.\n- --json / --agent output is stable and compact.\n- If the source benefits from history, add local SQLite sync plus since/diff commands.\n- Skill includes high-signal recipes and clear non-goals.\n- Dogfood proves at least three realistic agent workflows.