Add zenodo validator

.github/workflows/zenodo.yml

@@ -0,0 +1,24 @@
+name: Zenodo validator
+on: [push, pull_request]
+
+jobs:
+  zenodo:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 
+        uses: actions/setup-python@v5
+        with:
+          python-version:
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install check-jsonschema
+  
+        # From https://github.com/zenodraft/metadata-schema-zenodo/blob/main/schema.json
+      - name: Test
+        run: 
+            check-jsonschema --schemafile .github/workflows/zenodo.schema .zenodo.json
+