feat(cli): generate release notes in ~3 minutes (opt-in)

[harish-garg]

This adds a small, safe-by-default CLI to generate release notes from merged commits/tags.

• Runs locally; no secrets; no network by default
• Works without any LLMs; optional --llm polish via OpenAI-compatible endpoints
• Artifact-only: creates a Markdown file, never commits changes

Quick start:

python3 scripts/release_notes.py --last-tag > RELEASE_NOTES.md
# or pick a range:
python3 scripts/release_notes.py --since vX.Y.Z > RELEASE_NOTES.md

Why:

Release prep often takes ~30–45 minutes; this gets you to 2–3 minutes and is CI-friendly

Keeps human review as the default; easy rollback (artifact only)

If this is useful, I can also wire a GitHub Action that runs this on PRs and attaches the notes as an artifact, plus add guardrails/evals.

[harish-garg]

This is opt-in and artifact-only; happy to move it to a different folder if you prefer.

If useful, I can open a follow-up PR with a small GitHub Action that runs on pull_request and uploads RELEASE_NOTES.md as an artifact (no change to your release process).

[oscarlevin]

Thanks for this contribution. Since this package includes releases from the core pretext library, I will need to think about whether this sort of tool is worth it. Either way, I appreciate the time you spent on it.