Add Codex Stop-hook plan review

[ivanov17andrey]

Summary

• add Codex Stop hook plan review support that extracts the latest plan from rollout transcripts, opens Plannotator for fresh plans, and returns continuation feedback on denial
• cover the new Codex parsing and Stop flow with server tests and update Codex-facing installation and plan-review docs
• add a reproducible local Codex E2E harness plus checked-in screenshots showing the initial review, revised review, versions sidebar, diff view, and archive sidebar
• ignore the local .playwright-cli/ cache so Playwright-driven validation does not dirty the repo

Test plan

• /bin/bun test apps/hook/server/*.test.ts
• /bin/bun run --cwd apps/review build
• /bin/bun run --cwd apps/hook build
• PLANNOTATOR_BROWSER=/usr/bin/true ./tests/manual/local/test-codex-plan-review-e2e.sh --keep --skip-build --root-dir /tmp/plannotator-codex-stop-e2e-rerun3 with Playwright-driven review, denial, revision, versions, diff, archive, and approval flow

Screenshots

Initial plan review

Feedback before denial

Revised plan review

Versions sidebar after denial

Diff view against v1

Archive sidebar

[backnotprop]

Big one!

Give me some time to review but will priortize