Add total consumed energy to mqtt-discovery-sensors.js for Home Assistant

[Tataz2]

Is your feature request related to a problem? Please describe. You cannot track the energy comsumption because the script adds only tree sensors to Home Assitant: voltage, current and temperature.

Describe the solution you'd like shellyplugs-xxxxxxxxxxx/events/rpc has the comsumed energy as Wh. I would like to see this in Home Assistant.