List webhooks

curl --request GET \
  --url https://app.strix.ai/api/v1/webhooks \
  --header 'Authorization: Bearer <token>'

{
  "webhooks": [
    {
      "id": "<string>",
      "url": "<string>",
      "events": [
        "<string>"
      ],
      "secret_prefix": "<string>",
      "is_active": true,
      "last_success_at": "2023-11-07T05:31:56Z",
      "last_failure_at": "2023-11-07T05:31:56Z",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ]
}