Improving charging and battery signals

This PR contains various improvement suggestions to battery and charging signals.

Major changes:
- Battery identifiers added
- Extension of temperature signals
- State of health signal added
- NetCapacity changed to sensor
- Many Charging signals refactored to allow separate measurements for each phase.
- ChargePlugType now use an array, as vehicles mioght have multiple charge plugs
- Some signals for power loss (to heat) added