refactor: refactor climate.py

[SusanPhevos]

Why

Thermostat, heater, bath heater needs to be added as the climate entity. However, the previous climate.py has many repetitive codes. This PR refactors climate.py by setting several base classes.

Added

Supporting thermostat and ptc bath heater.

Test

Self-tested with some limited model.

[kekeandzeyu]

Maybe the title should be refractor, not refacor?

[CLAassistant]

All committers have signed the CLA.

[hzonz]

yeelink.bhf_light.v5 正确添加 climate 实体。

但是，只有除湿选项，无其它选项。

[SusanPhevos]

yeelink.bhf_light.v5

浴霸的模式显示为 Climate Entity 的 HAVC mode，根据 Home Assistant 文档 定义，HAVC model 只能使用内置的几个选项，不可添加自定义选项。
这个浴霸的模式包含除雾、快速除雾、快速加热，现将“快速加热”用HVACMode.HEAT表示，“除雾”用HVACMode.HEAT_COOL表示。这是一种折中方案。

[hzonz]

浴霸的模式显示为 Climate Entity 的 HAVC mode，根据 Home Assistant 文档 定义，HAVC model 只能使用内置的几个选项，不可添加自定义选项。 这个浴霸的模式包含除雾、快速除雾、快速加热，现将“快速加热”用HVACMode.HEAT表示，“除雾”用HVACMode.HEAT_COOL表示。这是一种折中方案。

参考 xiaomi miot auto