Display of the battery charge cycles as a sensor

[jh537]

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.

The value is stored in the S10 and it is important to monitor it. Since I use the integration, it should also be timed with it. Otherwise I would have to install something else, e.g. IO-Broker.

Describe the solution you'd like

I imagine a sensor in HA that I can read out and use for further calculations.

Describe alternatives you've considered

I would have to install something else, e.g. IO-Broker.

Additional context

No response

Diagnostics dump

No response

[torbennehmer]

See #204, there are a few thoughts, I'd like your feedback on.