forked from HomeAssistant/ha_xiaomi_home
* feat: add state_class for sensor * feat: add optional state_class and unit_of_measurement for properties * feat:add support for state_class and unit process * style: fix pylint format * style: fix pylint format * sytle: change logic to suit conversation --------- Co-authored-by: LiShuzhen <SusanPhevos@gmail.com>