ci: create GitHub Release after changeset publish

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: G4brym

.github/workflows/publish.yml

@@ -46,3 +46,16 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_CONFIG_PROVENANCE: true
+
+      - name: Create GitHub Release
+        if: steps.changesets.outputs.published == 'true'
+        run: |
+          VERSION=$(echo '${{ steps.changesets.outputs.publishedPackages }}' | jq -r '.[] | select(.name == "r2-explorer") | .version')
+          if [ -n "$VERSION" ]; then
+            gh release create "v${VERSION}" \
+              --title "v${VERSION}" \
+              --generate-notes \
+              --target main
+          fi
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}