features

• remove useless ToggleX entity from gs559
• added (initially disabled) standalone humidity sensor to mts300 (#614)
• improved compliance to official docs for action climate.set_temperature on mts300 thanks to #597 PR.
• implement delayed calibration for climate entities tracking temperature sensors (fixes #593)
• refactored some namespaces polling especially related to em06 (might affect some other devices with power readings/consumption)

fixes

• reverted a recent commit likely leading to #613
• #593
• #596
• maybe #611