Creates a Form Field Placement

curl --request POST \
  --url https://api.rootly.com/v1/form_fields/{form_field_id}/placements \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "form_field_placements",
    "attributes": {
      "form_set_id": "<string>",
      "form": "<string>",
      "position": 123,
      "required": true,
      "required_operator": "and",
      "placement_operator": "and",
      "non_editable": true
    }
  }
}
'

{
  "data": {
    "id": "8ceb563f-a477-45e2-8900-3a40350323e0",
    "type": "form_field_placements",
    "attributes": {
      "form_field_id": "48f4e68f-0f98-49e9-990e-7da75495e59b",
      "form_set_id": "f7d90106-dacd-4d19-b526-5b54c701b371",
      "form": "slack_new_incident_form",
      "position": 1,
      "required": false,
      "placement_operator": "and",
      "required_operator": "and",
      "non_editable": true
    }
  }
}