Add „is_deep_sleep“ endpoint

[Strobelix80]

Is it possible to also add the api endpoint „is_deep_sleep“?
Would be great to now if the tracker enters a sleepzone

[Strobelix80]

Please add this to binary_sensor.py

BinarySensorEntityDescription(
name="Deep Sleep",
key="is_in_deep_sleep",
device_class=None,
icon="mdi:sleep",
entity_category=EntityCategory.DIAGNOSTIC,
),

[eifinger]

If you can get the the urls to call and the return values as shown in https://github.com/eifinger/hass-weenect/blob/main/tests/const.py I can add this to the tests and as a feature.

You are also welcome to raise a PR yourself if you want to.