Add Arabic language

Author: VictoriousRaptor

Flow.Launcher.Core/Resource/AvailableLanguages.cs

@@ -26,6 +26,7 @@ internal static class AvailableLanguages
         public static Language Slovak = new Language("sk", "Slovenský");
         public static Language Turkish = new Language("tr", "Türkçe");
         public static Language Czech = new Language("cs", "čeština");
+        public static Language Arabic = new Language("ar", "اللغة العربية");
 
         public static List<Language> GetAvailableLanguages()
         {
@@ -52,7 +53,8 @@ public static List<Language> GetAvailableLanguages()
                 Norwegian_Bokmal,
                 Slovak,
                 Turkish,
-                Czech
+                Czech,
+                Arabic
             };
             return languages;
         }