fix(docs): remove invalid --cname flag from mike deploy

- Remove --cname flag which doesn't exist in mike
- Add CNAME file creation after deployment for custom domain
- CNAME file will be committed to gh-pages branch

Author: moazbuilds

.github/workflows/publish_docs.yml

@@ -34,6 +34,12 @@ jobs:
             uv run mike deploy dev --push
           elif [[ $GITHUB_REF == refs/tags/* ]]; then
             TAG_NAME=${GITHUB_REF#refs/tags/}
-            uv run mike deploy $TAG_NAME latest --update-aliases --push --cname docs.codemachine.co
+            uv run mike deploy $TAG_NAME latest --update-aliases --push
             uv run mike set-default latest --push
+            # Add CNAME file for custom domain
+            git checkout gh-pages
+            echo "docs.codemachine.co" > CNAME
+            git add CNAME
+            git commit -m "Add CNAME for custom domain" || true
+            git push origin gh-pages
           fi