move to a more standard python packaging structure

src/damaris/data/__init__.py

@@ -0,0 +1,10 @@
+from damaris.data.ADC_Result import ADC_Result
+from damaris.data.Accumulation import Accumulation
+from damaris.data.MeasurementResult import MeasurementResult, AccumulatedValue
+from damaris.data.DataPool import DataPool
+from damaris.data.Error_Result import Error_Result
+from damaris.data.Config_Result import Config_Result
+from damaris.data.Temperature import TemperatureResult
+
+__all__=["ADC_Result", "Accumulation", "MeasurementResult", "AccumulatedValue", "DataPool", "FFT", "Error_Result", "Config_Result", "TemperatureResult" ]
+