PV SolaX inverter cloud sensors via API

[mpietersen]

Just as an update, I reviewed the API again.
The API documentation is now at 6.1 and the only API still available is getRealtimeInfo.
The script from @andmcg is still working, but more advanced things can be reviewed here:

• Solax X1 Hybrid G4 (local & cloud API) - #173 by doudou49000
• Automated Octopus Saving Sessions with Solax X1 Hybrid G4 - #18 by kamilb