✨ 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

cspell.json

@@ -17,7 +17,8 @@
         "dbaeumer",
         "msvc",
         "publint",
-        "stricter"
+        "attw",
+        "arethetypeswrong"
     ],
     "ignorePaths": ["dist", "node_modules", "coverage", "*.svg", ".gitignore"]
 }