chore: add job for grid performance

Author: mbechev

.github/workflows/ci.yml

@@ -52,6 +52,12 @@ jobs:
         run: |
           npm ci
 
+      - name: Build Grid Performance app
+        working-directory: ./examples-standalone/grid-performance
+        run: |
+          npm ci
+          npm run build
+
       - name: Build Electron dashboard app
         working-directory: ./examples-standalone/electron-dashboard
         run: |