Update examples to use asyncio event loop

The user had tried to instantiate the client outside the
asyncio event loop, but it must be created within the loop
to handle asynchronous calls correctly.

This change updates the examples to use async functions
and runs them within an asyncio event loop.

Signed-off-by: Daniel Zullo <[email protected]>

Author: daniel-zullo-frequenz

pyproject.toml

@@ -145,6 +145,7 @@ disable = [
   "unsubscriptable-object",
   # Checked by mypy
   "no-member",
+  "no-name-in-module",
   # Checked by flake8
   "f-string-without-interpolation",
   "line-too-long",