List folders

curl --request GET \
  --url https://api.openint.dev/v0/unified/file-storage/folder \
  --header 'x-apikey: <api-key>' \
  --header 'x-connection-id: <api-key>'

{
  "next_cursor": "<string>",
  "has_next_page": true,
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "description": "<string>",
      "path": "<string>",
      "updated_at": "<string>",
      "created_at": "<string>",
      "raw_data": "<any>"
    }
  ]
}