Gui graphs

[timonmerk]

@SamedVossberg I've created this PR so some changes can be discussed

[timonmerk]

@SamedVossberg In the mnelsl_stream.py you wrote previously this code:

            for i in range(self._n_seconds_wait_before_disconnect):
                if (
                    data is not None
                    and check_data is not None
                    and np.allclose(data, check_data, atol=1e-7, rtol=1e-7)
                ):
                    logger.warning(
                        f"No new data incoming. Disconnecting stream in {3-i} seconds."
                    )
                    time.sleep(1)
                    i += 1
                    if i == self._n_seconds_wait_before_disconnect:
                        self.stream.disconnect()
                        logger.warning("Stream disconnected.")
                        break

What was the motivation behind that?

I guess something related to the example test run? I removed it now so that the LSL Stream can be tested in the frontend

[SamedVossberg]

@timonmerk The idea was to have a timeout for the lsl stream to terminate if no new data was incoming. As back then there was no option to stop the stream manually (we tried with a keyboard interrupt first back then but then decided against it) the timeout terminated the lsl connection if there wasn't any new data incoming for three consecutive seconds. And yes, it can be deleted as with the frontend established this will be deprecated.

[timonmerk]

@SamedVossberg would it be possible to merge the changes from your gui_data_processor branch in this one? For me it's mainly about the parts that fix the HeatMap visualization. I saw that you wrote some rust parts also, do you think we should merge those also in the gui branch?