Add Vehicle to Load setting

[jwillemsen]

Add support for Vehicle to Load as provided by the Kona 2024 EU EV. Value can be set between 20 and 80 with increments of 10, in the provided hyundai data it is the part below, full data attached.

                 'Electric':
                {
                    'SmartGrid':
                    {
                        'RealTimePower': 0,
                         'VehicleToGrid':
                        {
                            'Mode': 0
                        },
                         'VehicleToLoad':
                        {
                            'DischargeLimitation':
                            {
                                'SoC': 20,
                                 'RemainTime': 0
                            }
                        }
                    }
                },

kona2024data.txt