Support for blo/xfan command

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Is your feature request related to a problem? Please describe:
It seems there is no way of turning on xfan functionality, and that means the AC unit always shuts down immediately, without blowing out the moisture.

Describe the solution you'd like:
A per device (and default device) config option to always turn on Xfan together with cool, dry and auto modes. IMO Apple home control is not necessary for that.

Describe alternatives you've considered:
Other gree homebrige plugins and stock gree app. Still this plugin is the most promising one, and seems to be working flawlessly for me except for #20

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Thank you!