EV Charger (evcharger_mode and evcharger_position) show incorrect values

[gb095666]

evcharger_mode should show the following values (Manual,Auto,Scheduled) however currently they are incorrectly showing the position of the EV Charger, i.e. AC input or AC Output

evcharger_position is missing and should show the position of the EV Charger and detailed above.

evcharger_status is missing some status codes, from 15 to 23

I created a pull request # Update for Error from Victron EV Charger #68 on 24/05/23 which further details the changes required