Check openapi in CI

.github/workflows/doc.yml

@@ -0,0 +1,25 @@
+name: Documentation
+
+permissions: {}
+
+on:
+  push:
+  pull_request:
+    types: [synchronize, opened]
+
+jobs:
+
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+          cache: 'pip'
+
+      - run: pip install openapi-spec-validator
+
+      - run: openapi-spec-validator support/doc/api/openapi.yaml