implement Pipeline.message.write() and Pipeline.timestamp.record()

    def __repr__(self):

        return f"< Message [{self.file_path}] >"

    def write(self, dlist):

    def write(self, dlist: list[dict]):

        """Write messages to file."""

        with open(self.file_path, "w+") as f:

            for d in dlist:

                f.write(self.dict2msg(d) + "\n")

    @staticmethod

    def dict2msg(d):

    def dict2msg(d: dict):

        """Convert `dict` to JSON format string."""

        m = json.dumps(d).replace(" ", "")

        return m

    @staticmethod

    def msg2dict(m):

    def msg2dict(m: str):

        """Convert JSON format string to `dict`."""

        d = json.loads(m)

        return d

        with open(self.file_path, "w") as file:

            file.truncate(0)

    def touch(self):

        """Write a time stamp."""

    def record(self):

        """Record a time stamp."""

        with open(self.file_path, "a+") as f:

            f.write(f"{Time.now().isot}+00:00\n")