Add yyj extraction hood device support

[JobDoesburg]

Add support for an extraction hood device (air purifier + lightbulb).

Also changed the rotation speed property to properly display a 0% to 100% range (with larger steps), instead of 0% to 4% in case of 5 steps.

[0x5e]

thanks @JobDoesburg ! change range cause 2 problem, one is during the plugin upgrade, cache issue, second is I forgot why I'm doing this, must have a reason...

[JobDoesburg]

The reason for the changed rotation speed is to properly reflect the current status in homekit. Without the change I propose, a fan can be running at "4%" which would be the max speed, and each step is 1%. That looks weird in homekit. It is more intuitive to have the max speed be 100%, the lowest speed (off) be 0% and have intermediate steps. That is what the "step" property is for.

Do you have a suggestion for fixing the cache issue on upgrade? What is exactly the problem?

[0x5e]

Yes I agree with you, minstep=1 looks weird...
Correct me if I was wrong, I already set the unit to 'speed' instead of '%'. so in homekit, speed level will be shown as "1 speed", "2 speed", "3 speed", not "1%", "2%", "3%".
Another problem is, there's another fan device they have 3 steps, 5 steps, 6 steps or even 26 steps. most of them can't be devided by 100.
For the 26 step fan, 0, 3%, 6%, 9%, ... to 78%. There's a issue said he set the speed to 13/26, and expected to see 50% but not ... #44
For the cache issue #174 I didn't find out how to fix it by code.

[0x5e]

The jjy part is good for me, I suggest we split the rotation speed code into another pr is that okay? Anyway thanks for the help :)

[JobDoesburg]

Correct me if I was wrong, I already set the unit to 'speed' instead of '%'. so in homekit, speed level will be shown as "1 speed", "2 speed", "3 speed", not "1%", "2%", "3%".

Hmm, also not entirely sure about this, but I remember HomeKit not displaying this properly everywhere (which would probably be a bug on Apple's side)

The jjy part is good for me, I suggest we split the rotation speed code into another pr is that okay?

Definitely!

[0x5e]

Thanks again!