check json format on pull request

.github/workflows/json-lint.yml

@@ -0,0 +1,31 @@
+name: pr_jsonlint
+
+on:
+  pull_request:
+    paths:
+      - 'module/webui/locales/*.json'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+
+      - name: Install JSON linter
+        run: npm install -g jsonlint
+
+      - name: Lint JSON files
+        run: |
+          for file in $(find module/webui/locales -name "*.json"); do
+            echo "Checking $file"
+            if ! jsonlint "$file"; then
+              echo "Error in $file"
+              exit 1
+            fi
+          done