Add workflow to validate JSON

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Use Node.js 20
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
+
+    - run: npm install
+
+  validate_list:
+    runs-on: ubuntu-latest
+
+    needs: [build]
+
+    steps:
+    - run: npm test
+