Cleaned up using in project. Improved prohect structure and refactored page names. Upgraded dependencies

Moonlight.Frontend/Admin/Sys/Themes/Update.razor

@@ -1,4 +1,5 @@
 @page "/admin/system/themes/{Id:int}"
+
 @using LucideBlazor
 @using Microsoft.AspNetCore.Authorization
 @using Moonlight.Frontend.Infrastructure.Helpers
@@ -14,7 +15,6 @@
 @using ShadcnBlazor.Fields
 @using ShadcnBlazor.Inputs
 @using ShadcnBlazor.Switches
-@using SerializationContext = Moonlight.Shared.SerializationContext
 
 @attribute [Authorize(Policy = Permissions.Themes.Edit)]