add coral_web workflow

.github/workflows/interface_tests.yml

@@ -0,0 +1,21 @@
+name: Interface Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request: {}
+
+jobs:
+  interface_tests:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: src/interfaces/coral_web
+
+steps:
+  - name: Checkout repo
+    uses: actions/checkout@v3
+  - name: Check coral_web is formatted
+    run: pnpm format
+  - name: Check coral_web can build
+    run: pnpm build