Add support for humidificaton mode for Daikin Urura Sarara series

[zen2]

Daikin Urura Sarara series have an additional mode to humidify.

There was a related issue on bitbucket repo:
https://bitbucket.org/mustang51/pydaikin/issues/2/daikin-ururu-sarara-add-support-for

There is also a related homeassistant issue:
home-assistant/core#88156 (comment)

One user have reported a dump trace:
ret=OK,pow=1,mode=HUM,adv=,stemp=--,shum=50,dt1=22.0,dt2=M,dt3=25.0,dt4=--,dt5=--,dt7=22.0,dh1=50,dh2=50,dh3=0,dh4=50,dh5=50,dh7=50,dhh=50,b_mode=4,b_stemp=--,b_shum=50,alert=255,f_rate=4,f_dir=3,b_f_rate=4,b_f_dir=3,dfr1=6,dfr2=A,dfr3=5,dfr4=4,dfr5=4,dfr6=A,dfr7=6,dfrh=5,dfd1=3,dfd2=0,dfd3=0,dfd4=3,dfd5=3,dfd6=3,dfd7=3,dfdh=0

Do you need other similar dumps ?

I know that actually Homeassistant can't use such a mode but is it possible to implement a call service ?