feat: enhance RSS feed with additional weather data

- Add country name, city name, and state name to the RSS feed
- Include weather description and AI-generated description
- Add weather date to provide more context for each item

These changes improve the RSS feed by providing more detailed
information about the weather art, enhancing the user experience
and making the feed more informative for subscribers.

app/views/rss/feed.rss.builder

@@ -12,7 +12,12 @@ xml.rss version: "2.0",
     @weather_arts.each do |art|
       xml.item do
         xml.title "#{art.city.full_name}  Weather Art"
-        xml.description art.description
+        xml.countryName art.city&.country&.name
+        xml.cityName art.city&.name
+        xml.stateName art.city&.state&.name
+        xml.weatherDescription art.description
+        xml.aiDescription art.prompt
+        xml.weatherData art.weather_date
         xml.pubDate art.created_at.to_fs(:rfc822)
         xml.link city_weather_art_url(art.city, art)
         xml.guid city_weather_art_url(art.city, art)