* Add polling of Powerwall 3 Devices to pull in PW3 specific string data, capacity, voltages, frequencies, and alerts.
* This creates mock TEPOD, PVAC and PVS compatible payloads available in vitals().
Proxy URLs updated for PW3:
* http://localhost:8675/vitals
* http://localhost:8675/help (verify pw3 shows True)
* http://localhost:8675/tedapi/components
* http://localhost:8675/tedapi/battery