On API V2 devices add action for single phase or all phases charging

[oh2th]

Changing between single phase and all phases charging has been suggested

• set 1-phase - http://1.2.3.4/api/set?psm=1
• set 3-phase - http://1.2.3.4/api/set?psm=2

https://community.homey.app/t/app-pro-go-e-charger-electric-car-charger/14162/78