Expanding theme tab to customization tab. Started improving theme selection.

Moonlight.Shared/Http/Requests/Admin/Sys/Theme/CreateThemeRequest.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+using Moonlight.Shared.Misc;
+
+namespace Moonlight.Shared.Http.Requests.Admin.Sys.Theme;
+
+public class CreateThemeRequest
+{
+    [Required(ErrorMessage = "You need to provide a name")]
+    public string Name { get; set; }
+    
+    [Required(ErrorMessage = "You need to provide an author")]
+    public string Author { get; set; }
+    
+    [Required(ErrorMessage = "You need to provide a version")]
+    public string Version { get; set; }
+    
+    public string? UpdateUrl { get; set; }
+    public string? DonateUrl { get; set; }
+    
+    public ApplicationTheme Content { get; set; }
+}