I added 'windSpeed' and 'windDirection', required by some dashboards. I changed 'weather' from condition_text (e.g. 'Partly Cloudy') to condition_code (e.g. 'partlycloudy'), so it is the same as weatherIcon now.
Two things here: 1) in your post the attribute is 'weatherIcons' (it has a trailing 's'); and 2) I have no idea where values for that attribute come from. I could add the 'weatherIcons' if I had a way to populate that with appropriate values, and I don't know what those may be? You mention these may be openWeather tiles ... I have never used openWeather and the DarkSky may not work with those unless someone can map a DarkSky attribute to the openWeather source (or whatever the expected source is).