feat: Initial commit for DorkNet Admin Mobile app

- Implemented main application structure using .NET MAUI.
- Added App class to manage navigation between Login and Admin pages.
- Created AppDesign class for consistent UI styling.
- Developed pages: LoginPage, DashboardPage, PlayersPage, RoomsPage, SettingsPage, and AdminTabbedPage.
- Integrated AdminApiClient for API interactions and SecureAdminSettings for secure storage of sensitive data.
- Configured Android and iOS platform-specific files including manifest and app delegate.
- Added README with build instructions and authentication details.

DorkNet.AdminMobile/Platforms/iOS/Program.cs

@@ -0,0 +1,11 @@
+using UIKit;
+
+namespace DorkNet.AdminMobile;
+
+public static class Program
+{
+    public static void Main(string[] args)
+    {
+        UIApplication.Main(args, null, typeof(AppDelegate));
+    }
+}