New `update_board_hierarchy` mutation

mutation {
  update_board_hierarchy(
    board_id: 1234567890,
    attributes: {
      account_product_id: 54321
      workspace_id: 12345
      folder_id: 9876543210
      position: {
        object_id: "15",
        object_type: Overview,
        is_after: true
      }
    }
  ) {
    success
  }
}