Add a job to check the demo

.github/workflows/demo.yml

@@ -0,0 +1,20 @@
+# Run a job to ensure formatting is OK
+name: Run demo
+on:
+ pull_request:
+ paths:
+ - demo/**
+
+ push:
+ paths:
+ - demo/**
+
+jobs:
+ format-check:
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v3
+
+ - name: Run Demo
+ run: ./demo/run_demo.sh