Polish v0.2.0 release readiness

[zimoby]

Summary

• make release-status and external AE proof claims precise
• ship TypeScript sources so packaged source maps resolve
• support and test Node 22 and 24 LTS lines
• enforce canonical npm CLI metadata and package boundaries

Verification

• npm run check on Node 22.22.3
• npm run check on Node 24.6.0
• packed-tarball consumer import, all template exports, source-map resolution, and CLI smoke test
• npm publish --dry-run (61 files; no manifest auto-correction)
• git diff --check