Creates a workflow group

curl --request POST \
  --url https://api.rootly.com/v1/workflow_groups \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "workflow_groups",
    "attributes": {
      "name": "<string>",
      "kind": "simple",
      "description": "<string>",
      "icon": "<string>",
      "expanded": true,
      "position": 123
    }
  }
}'

{
  "data": {
    "id": "3e57b2cd-0869-4e1f-b7a1-41c83e6483eb",
    "type": "workflow_groups",
    "attributes": {
      "kind": "incident",
      "name": "Test",
      "description": null,
      "icon": "📁",
      "slug": "test-incident",
      "expanded": true,
      "position": 1
    }
  }
}