webhook set for thing not exported into json/yaml and no arduino-cloud-cli to set webhook

[Bodobolero]

The Arduino IoT Cloud web interface allows to set a webhook associated with a thing.

Since the webhook can not be set using the arduino-cloud-cli this is a showstopper for me to automate deployment with the cli.

It would be nice to add the webhook functionality to the cli.

Note that the API https://www.arduino.cc/reference/en/iot/api/#api-ThingsV2-thingsV2Create supports creating web hooks.