Retrieves a custom form

curl --request GET \
  --url https://api.rootly.com/v1/custom_forms/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "94ebd4b1-0b1a-4ca4-b250-333c8c843e7d",
    "type": "custom_forms",
    "attributes": {
      "slug": "aspernatur-et-omnis-omnis",
      "name": "Aspernatur et omnis omnis.",
      "description": "Necessitatibus suscipit voluptatem blanditiis.",
      "enabled": true,
      "command": "aspernatur-et-omnis-omnis",
      "created_at": "2025-07-23T05:27:01.907-07:00",
      "updated_at": "2025-07-23T05:27:01.907-07:00"
    }
  }
}