Add "balance_str", reformat file

    def to_dict(

        self,

    ) -> dict[Literal["name", "cl_account_name", "balance_cents"], str | int]:

    ) -> dict[

        Literal["name", "cl_account_name", "balance_cents", "balance_str"], str | int

    ]:

        return {

            "name": self.name,

            "cl_account_name": self.cl_account_name,

            "balance_str": self.balance_str,

            "balance_cents": self.balance_cents,

        }