Creates a cause

curl --request POST \
  --url https://api.rootly.com/v1/causes \
  --header 'Authorization: Bearer REPLACE_BEARER_TOKEN' \
  --header 'content-type: application/vnd.api+json'

{
  "data": {
    "id": "d6c4fda5-0dcc-4435-b26d-9f834165be92",
    "type": "causes",
    "attributes": {
      "slug": "how-to-handle-customer-facing-incident",
      "name": "How to handle customer-facing incident?",
      "description": "This is a description",
      "position": 1,
      "created_at": "2025-03-13T11:59:31.447-07:00",
      "updated_at": "2025-03-13T11:59:31.447-07:00"
    }
  }
}