TeamCreateRequest

Request body for POST /api/teams.

parent is an optional team ref (+slug or bare slug); when present the
new team is created as a child in kb_teams_parents and the caller must be
owner/maintainer on the parent. auto_join_role is admin-gated.

{
    "auto_join_role": null,
    "name": "string",
    "parent": "string",
    "slug": "string"
}