Code improvements : icon fields are now typed as Icons, move the location string when creating a new instance of CurrentWeather, fix SimpleWeatherService::CurrentWeather::operator== (location was missing from the comparison).
Add missing icons (heavy clouds, thunderstorm, snow).
Remove unneeded comparison operator (!=), improve conversion of Timestamp and MessageType, order includes.
Fix typo in documentation.
Remove not related change in StopWatch.
This new implementation of the weather feature provides a new BLE API and a new weather service.
The API uses a single characteristic that allows companion apps to write the weather conditions (current and forecast for the next 5 days).
The SimpleWeather service exposes those data as std::optional fields.
This new implementation replaces the previous WeahterService.
The API is documented in docs/SimpleWeatherService.md.
