Fix Export Limit on single phase DT inverters

Single phase "DT" family inverters (DNS, XS etc...) use export limit in Watts, while 3 phase inverters in % of nominal power.

Improve Eco Mode switching

When switching to Eco Mode Charge/Discharge, do not clear the schedules 2-4, just turn them off.

Add support for ESA inverters

Improve model detection so it correctly identifies newer models like ESA.

Add Eco Mode V2 to ES inverter

Add Eco Mode V2 to ES inverter.
Consolidate/unify EcoMode v1/v2 implementations.

Add eco_mode1-4 to ES inverters

Add eco_mode1-4 to ES inverters.
Fix identification of MST models.
Add Load Control settings to ET inverters.

Fix ECO modes on ES inverters

Fix ECO modes on ES inverters
Add peak_shaving_mode, dod_holding, dred settings to ET inverters

Add "fast charging" settings to ET inverters

Add "fast charging" settings to ET inverters.
Change the get_operation_mode return type.

Add support for "Peak Shaving" mode

Add support for "Peak Shaving" mode on ET inverters with arm fw >=22
Change API of set_working_mode to operate with OperationMode enums instead of ints.

Add support for GE's 4 MPTT inverters

Add support for GE's 4 MPTT inverters - GEH models

Fix eco mode settings on ES inverters

Fix wrong order of parameter in eco mode settings on ES inverters.