Create feature provider script.

src/features/phone_esm/straw/main.py

@@ -0,0 +1,7 @@
+import pandas as pd
+
+
+def straw_features(sensor_data_files, time_segment, provider, filter_data_by_segment, *args, **kwargs):
+    # empty for now
+    your_features_df = pd.DataFrame()
+    return(your_features_df)