Creates a custom form

curl --request POST \
  --url https://api.rootly.com/v1/custom_forms \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "custom_forms",
    "attributes": {
      "name": "<string>",
      "slug": "<string>",
      "description": "<string>",
      "enabled": true,
      "command": "<string>"
    }
  }
}'

{
  "data": {
    "id": "f2bf4d8b-4756-4036-b01e-864a67597cd6",
    "type": "custom_forms",
    "attributes": {
      "slug": "test",
      "name": "Test",
      "description": null,
      "enabled": true,
      "command": "test",
      "created_at": "2025-09-07T18:19:32.195-07:00",
      "updated_at": "2025-09-07T18:19:32.195-07:00"
    }
  }
}