✨ Add @arethetypeswrong/cli (attw) as publish:attw

Validates the emitted .d.ts declarations against multiple TypeScript
module-resolution scenarios. Same rationale as publint: it validates
the publishable artifact, not the source, so it belongs in the
publish: prefix, not check:.

- Add publish:attw script using --profile esm-only (the package is
  intentionally ESM-only; CJS resolution is out of scope by design)
- Add step to CI publish job, after publish:publint and before
  npm publish
- Document the script and the esm-only rationale in project-specs.md
  and README.md
- Add 'attw' and 'arethetypeswrong' to cspell word list
- Remove unused 'stricter' word that was added speculatively before

.github/workflows/ci.yml

@@ -39,6 +39,7 @@ jobs:
             - run: npm ci
             - run: npm run build
             - run: npm run publish:publint
+            - run: npm run publish:attw
             - run: npm publish --access public
               env:
                   NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}