Add LanguageSwitcher component

Oqtane.Server/Pages/_Host.cshtml

@@ -48,6 +48,12 @@
     @if (Configuration.GetSection("Runtime").Value == "WebAssembly")
     {
         <script src="_framework/blazor.webassembly.js"></script>
+        <script>
+            window.oqtaneCulture = {
+                get: () => window.localStorage['OqtaneCulture'],
+                set: (value) => window.localStorage['OqtaneCulture'] = value
+            };
+        </script>
     }
     else
     {

Oqtane.Server/Startup.cs

@@ -127,6 +127,7 @@ namespace Oqtane
             services.AddScoped<ISiteTemplateService, SiteTemplateService>();
             services.AddScoped<ISqlService, SqlService>();
             services.AddScoped<ISystemService, SystemService>();
+            services.AddScoped<ILocalizationService, LocalizationService>();
 
             services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();