fix(css): remove weather-icons font classes from img to fix icon distortion

The `wi` class from MagicMirror's global weather-icons library was applied
to the current-weather `<img>`, setting font-related CSS that interfered
with the image's intrinsic aspect ratio and caused elongated icons.

Remove `wi`/`wi-*` classes (unused on an img element) and add
`flex-shrink: 0` to prevent the flex container from compressing the width.

Author: KristjanESPERANTO

MMM-OneCallWeather.js

@@ -612,7 +612,7 @@ Module.register('MMM-OneCallWeather', {
     largeWeatherIcon.className = 'large-weather-icon-container light'
 
     const weatherIcon = document.createElement('img')
-    weatherIcon.className = `wi weathericon wi-${currentWeather.weatherIcon}`
+    weatherIcon.className = 'weathericon'
     weatherIcon.src = `modules/MMM-OneCallWeather/icons/${this.config.iconset}/${currentWeather.weatherIcon}.${this.config.iconsetFormat}`
     largeWeatherIcon.appendChild(weatherIcon)