add validate script

.github/workflows/validate-apps.yml

@@ -0,0 +1,22 @@
+on:
+  pull_request:
+    branches:
+      - main
+name: Pull request workflow
+jobs:
+  validate_earn_strategies:
+    name: Validate App Store
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          submodules: true
+
+      - name: Install JSON-Schema-Validator
+        run: npm install -g jsonschema
+
+      - name: Validate App Store Schema
+        run: jsonschema -i ./cms/apps/applications.json ./schemas/applications.schema.json