Add GH action check to ensure there are no leftover changeset files o…

…n release

.github/workflows/test.yml

@@ -77,3 +77,18 @@ jobs:
           webpackStatsFile: ./packages/test-bundles/dist/shopify-read-webpack-stats.json
           key: ${{ secrets.RELATIVE_CI_SHOPIFY_BUNDLE_KEY }}
           token: ${{ secrets.GITHUB_TOKEN }}
+  validate-no-leftover-changesets:
+    runs-on: ubuntu-latest
+    steps:
+      # Checkout the repository
+      - name: Checkout Code
+        uses: actions/checkout@v3
+      - name: Verify changesets folder is empty in the react package
+        run: |
+          FOLDER_PATH="./packages/react/.changeset"
+          if [ -d "$FOLDER_PATH" ] && [ "$(ls -A $FOLDER_PATH)" ]; then
+            echo "The changesets folder $FOLDER_PATH is not empty!"
+            exit 1
+          else
+            echo "The folder $FOLDER_PATH is empty."
+          fi