Extract favicon_url to CoreComponents

lib/music_library_web/live/artist_live/show.html.heex

@@ -191,7 +191,7 @@
           >
             <img
               class="mr-2"
-              src={MusicLibrary.Artists.favicon_url(external_link)}
+              src={favicon_url(external_link.url)}
               alt={external_link.name}
               loading="lazy"
             />

lib/music_library_web/live/online_store_template_live/index.html.heex

@@ -30,7 +30,7 @@
         <div class="min-w-0">
           <div class="flex items-center gap-x-2">
             <img
-              src={MusicLibrary.OnlineStoreTemplates.favicon_url(template)}
+              src={favicon_url(template.url_template)}
               alt={template.name}
             />
             <p class="text-sm font-semibold text-gray-900 dark:text-white">

lib/music_library_web/live/wishlist_live/show.html.heex

@@ -290,7 +290,7 @@
         >
           <img
             class="mr-2"
-            src={MusicLibrary.OnlineStoreTemplates.favicon_url(template)}
+            src={favicon_url(template.url_template)}
             alt={template.name}
             loading="lazy"
           />