Missing documentation on how to use this module

[oliv3r]

Checklist

• I have filled out the template to the best of my ability.
• This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
• This issue is not a duplicate feature request of previous feature requests.

Is your feature request related to a problem? Please describe.

This will start as a placeholder to come up with points to add to the documentation.

• The addon, or rather pynukibt, doesn't support configuring things, including setting up a pincode. However, afaik the pincode has become mandatory for the ultra (gen5) and thus one needs to do some configuration with the official app first.
• Ultra 5 is currently not supported due to the changes in the API.

Describe the solution you'd like

Add more documentation

Describe alternatives you've considered

Create an issue so we can track the missing bits and have a discussion (e.g. if securitypin is mandatory for ultra, we would have to implement that feature ...)

also, while pynukibt probably wants to be feature complete at some point, how would we deal with it in this integration, if it is the only user. Does HA have easy ways to do actual configuration of things ...

Additional context

NA