Get all product categories

curl --request GET \
  --url https://api.chift.eu/consumers/{consumer_id}/commerce/product-categories \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "<string>",
      "source_ref": {
        "id": "<string>",
        "model": "<string>"
      },
      "name": "<string>",
      "parent_id": "<string>"
    }
  ],
  "total": 1,
  "page": 2,
  "size": 2
}