docs: link reusable AI-native starter

[kavatana]

What & why

Link CHNAI LAB's public workflow to the new product-neutral AI-native team
starter, and clarify that commit co-author credit is reserved for humans who
materially contributed and consented to the attribution.

Closes #3

How it was verified

• python3 scripts/verify_profile.py
• python3 -m py_compile scripts/verify_profile.py
• git diff --check
• Confirmed the linked starter is public and its CI is green

AI involvement

• Agent/tool used: Codex
• Human verification performed: repository policy check, rendered-copy review,
  and link target validation remain required before merge
• Sensitive context shared with tools: none
• Org/repo guide files read by the agent: AGENTS.md, CONTRIBUTING.md,
  SECURITY.md, docs/AI_AGENT_WORKFLOW.md

Risk & rollback

Low-risk public documentation change. Revert the commit if the external starter
is retired or ownership changes.

Public/private boundary

• No secrets, credentials, private user data, or private strategy exposed
• No unsupported traction, revenue, safety, compliance, or certification claims
• No staged co-author, review, or achievement activity

[kavatana]

Superseded by #6, which includes this PR's human-only co-author policy, authentic-contribution guidance, reusable starter links, and verifier coverage as part of the complete organization operating system. Closing the duplicate keeps one canonical review path; no unique change is being discarded.