Add room_temperature attribute for Sinope floor heat thermostat

[decompil3d]

Hi folks - this is my first time contributing here. I've got this Sinope floor heat thermostat. The quirk for it already knows about the room_temperature attribute. But I want to expose that attribute as a Home Assistant sensor.

I think this is how to do it, but I'd appreciate any feedback. Also, I'm not sure how to test this - is there an easy way to try this on my HA instance to verify that it works?

Thanks for your help!

[TheJulianJES]

This won't create a new entity. It'll only initialize (read) the room_temperature attribute upon pairing.
We should be able to create a new sensor entity via a v2 quirk.

The original TH1300ZB v1 quirk would have to be converted to a v2 quirk first.
Then, we can add .sensor. Take a look at other quirks in the repo that use .sensor or .tuya_sensor.

In the end, it should look something like this I think:

(
    QuirkBuilder(SINOPE, "TH1300ZB")
    .replaces(SinopeTechnologiesElectricalMeasurementCluster)
    .replaces(SinopeTechnologiesThermostatCluster)
    .replaces(SinopeTechnologiesManufacturerCluster)
    .sensor(
        attribute_name=SinopeTechnologiesManufacturerCluster.AttributeDefs.floor_temperature.name,
        cluster_id=SinopeTechnologiesManufacturerCluster.cluster_id,
        device_class=SensorDeviceClass.TEMPERATURE,
        state_class=SensorStateClass.MEASUREMENT,
        unit=UnitOfTemperature.CELSIUS,
        translation_key="room_temperature",
        fallback_name="Room temperature",
    )
    .add_to_registry()
)

Drafting this PR for now.