This adds a generic interface for all device classes to introspect available device features,
that is necessary to make it easier to support a wide variety of supported devices with different set of features.
This will allow constructing generic interfaces (e.g., in homeassistant) that fetch and change these features without hard-coding the API calls.
`Device.features()` now returns a mapping of `<identifier, Feature>` where the `Feature` contains all necessary information (like the name, the icon, a way to get and change the setting) to present and change the defined feature through its interface.
* Fix for P100 on fw 1.1.3 login_version none
* Fix coverage
* Add delay before trying default login
* Move devtools and fixture out
* Change logging string
Co-authored-by: Teemu R. <tpr@iki.fi>
* Fix test
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Co-authored-by: Teemu R. <tpr@iki.fi>