[senechome] issue #10679: Extend with additional channels; refactor and various improvements (#10687)

* [senechome] Extend with additional channels; refactor; improve error handling (#10679). Merged PR 9535 (rename batteryState to system state)

- charge/discharge energy/current/voltage/min/maxCellVoltage/load cycles per battery pack
- current/power/voltage per MPP
- liveHouseConsumption/livePowerGenerator
- battery,case,MCU temperature
- wallbox1: state, charging power/current, liveEnergy
- improve error handling, catch malformed JSON exception to prevent crashing the binding
- merged PR: 9535 (rename batteryState to systemState)
- renamed SenecHomeLimitation to SenecHomePower and added more channels
- refactored SenecHomeHandler to reduce code duplication (added some nice helper methods)

Signed-off-by: Erwin Guib <eguib@web.de>

CODEOWNERS

@@ -251,7 +251,7 @@
 /bundles/org.openhab.binding.samsungtv/ @paulianttila
 /bundles/org.openhab.binding.satel/ @druciak
 /bundles/org.openhab.binding.semsportal/ @itb3
-/bundles/org.openhab.binding.senechome/ @vctender @KorbinianP
+/bundles/org.openhab.binding.senechome/ @vctender @KorbinianP @eguib
 /bundles/org.openhab.binding.seneye/ @nikotanghe
 /bundles/org.openhab.binding.sensebox/ @hakan42
 /bundles/org.openhab.binding.sensibo/ @seime