✅(app-desk) add fetch-mock and adapt the tests

- Adapt the tests to use React-Query
- Install fetch-mock to mock the fetch requests with Jest.
- Create a test to show how to mock the fetch requests
with fetch-mock

renovate.json

@@ -18,7 +18,8 @@
         "npm"
       ],
       "matchPackageNames": [
-        "node"
+        "node",
+        "node-fetch"
       ]
     }
   ]