Adds an outside battery sensor to the integration, providing information about the battery level of the outdoor sensor.
This includes:
- Mapping the `t1bat` WSLink item to the `OUTSIDE_BATTERY` sensor.
- Implementing logic to convert the battery level to a human-readable text representation and a corresponding icon.
- Updates precipitation to intensity and fixes data type of battery level
Includes new sensor connection status constants and mappings
Updates WeatherSensor to handle null data values
Switches temperature unit to Celsius for WSLink sensors
Refines heat and chill index calculations with unit conversions
- A new constant `WIND_AZIMUT` is added to allow creating a wind direction sensor that returns a text value from `UnitOfDir` instead of just a numeric degree value.
- The wind direction sensor entity now optionally creates both a numeric wind direction sensor using `WIND_DIR` and a text-based azimuth sensor using `WIND_AZIMUT`. If the numeric one is enabled, the text one will also be added.
So in summary, these changes improve the usability of wind data by adding a more human-readable text version alongside the existing numeric version.