List webhook messages

curl --request GET \
  --url https://api.buildr.com/api/2023-01/webhook_messages \
  --header 'Authorization: <authorization>'

{
  "webhook_messages": [
    {
      "id": "msg_1srOrx2ZWZBpBUvZwXKQmoEYga2",
      "event_type": "project.create",
      "event_id": "evt_pNZKtWg8Azow",
      "payload": {
        "id": "372",
        "url": "https://example.com/372"
      },
      "timestamp": "2019-08-24T14:15:22Z"
    }
  ]
}