* [evcc] Change DTO from double to float as the higher precision is not required * [evcc] Change DTO from int/long to float * [evcc] Update JavaDoc & small improvements * [evcc] `EvccHandler`: Add exception message to the debug log Fixes https://github.com/openhab/openhab-addons/issues/13646. Avoids problems with changed data types in the future by generally using float instead of int. Signed-off-by: Florian Hotze <florianh_dev@icloud.com>