add shorthands for constructs classes, for easier notebook plotting

[nowheremanx]

Currently, we have to call utils to plot the objects like trace, geofence, which always calls folium.

However, users might want a plot method just like geopandas.GeoDataframe:

• trace.plot() which is equals to trace._frame.plot()
• geofence.plot() which is equals to geofence.geometry