resolve language from navigator langs (#139)

Co-authored-by: FloatingGhost <hannah@coffee-and-dreams.uk>
Reviewed-on: https://akkoma.dev/AkkomaGang/pleroma-fe/pulls/139

src/components/interface_language_switcher/interface_language_switcher.vue

@@ -1,5 +1,6 @@
 <template>
   <div>
+    <FAIcon icon="globe" style="color: white;" /> {{ ' ' }}
     <label for="interface-language-switcher">
       {{ promptText }}
     </label>