initial support of Pure Multi 700 Humidifier-Purifier

[danielskowronski]

This is minimal working code for adding read-only capabilities for Pure Multi 700.

There's issue with capabilities listed in api.developer.electrolux.one - only Fanspeed is listed (except for read-only sensors) and that one is supported as a valid command. This is not the case in mobile app and /~https://github.com/Woyken/py-electrolux-ocp which use api.ocp.electrolux.one/api.eu.ocp.electrolux.one (plus v2 instead of v1). I contacted Electrolux support about that.

I'm also not sure about model_name being actually a model name, it rather seems to be a model driver or model series - Pure Multi 700 reports itself as Verbier. This is confusing with the actual model name stored in field model (PUREMULTI700 in my case).

[danielskowronski]

Marking as ready for review, this won't be instant for Electrolux to solve missing capabilities issues - after reviewing /~https://github.com/Woyken/py-electrolux-ocp I see that Electrolux indeed uses v2 and v1 API specs - so it's not a matter of switching to other host with same endpoints (v2 uses raw username and password from mobile app).

Moreover, even v2 is bugged when it comes to capability listing and requires dirty hacks like albaintor/homeassistant_electrolux_status#113. Although, at least, v2 API accepts commands that are not listed in capabilities.

[JohNan]

Thank you! It's a good start!

Let's hope that Electrolux fixes their API. I emailed them once when there was some missing writable capabilities for the Pure A9 and within 2 weeks it was fixed. It might be worth a shot!