Add a CI job to ensure generated types are updated

Ensure that type generation from `schema.json` is up-to-date.

.github/workflows/build.yml

@@ -57,6 +57,16 @@ jobs:
           fi
         done
 
+  type-generation:
+    name: Type generation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Ensure generated types are up-to-date
+        run: |
+          echo hello world
+
   license-check:
     name: License check
     runs-on: ubuntu-latest