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/Android/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+  <uses-permission android:name="android.permission.INTERNET" />
+  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>

DorkNet.AdminMobile/Platforms/Android/MainActivity.cs

@@ -0,0 +1,18 @@
+using Android.App;
+using Android.Content.PM;
+using Microsoft.Maui;
+
+namespace DorkNet.AdminMobile;
+
+[Activity(
+    MainLauncher = true,
+    ConfigurationChanges =
+        ConfigChanges.ScreenSize |
+        ConfigChanges.Orientation |
+        ConfigChanges.UiMode |
+        ConfigChanges.ScreenLayout |
+        ConfigChanges.SmallestScreenSize |
+        ConfigChanges.Density)]
+public class MainActivity : MauiAppCompatActivity
+{
+}

DorkNet.AdminMobile/Platforms/Android/MainApplication.cs

@@ -0,0 +1,13 @@
+using Android.App;
+using Android.Runtime;
+using Microsoft.Maui;
+using Microsoft.Maui.Hosting;
+
+namespace DorkNet.AdminMobile;
+
+[Application]
+public class MainApplication(nint handle, JniHandleOwnership ownership)
+    : MauiApplication(handle, ownership)
+{
+    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+}