Refactor MainActivity, MainApplication, and Breadcrumb

Refactored `MainActivity` to a single-line declaration for simplicity.
Streamlined `MainApplication` by moving the constructor inline
and removing its explicit body. Updated `Breadcrumb.xaml.cs` to
use the C# range operator (`[..]`) for cleaner and more concise
syntax in LINQ expressions and list operations.

Author: IeuanWalker

Demo/Platforms/Android/MainActivity.cs

@@ -4,6 +4,4 @@
 namespace App;
 
 [Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
-public class MainActivity : MauiAppCompatActivity
-{
-}
+public class MainActivity : MauiAppCompatActivity;

Demo/Platforms/Android/MainApplication.cs

@@ -4,11 +4,7 @@
 namespace App;
 
 [Application]
-public class MainApplication : MauiApplication
+public class MainApplication(IntPtr handle, JniHandleOwnership ownership) : MauiApplication(handle, ownership)
 {
-	public MainApplication(IntPtr handle, JniHandleOwnership ownership) : base(handle, ownership)
-	{
-	}
-
 	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
 }

Scr/Breadcrumb.xaml.cs

@@ -155,7 +155,7 @@ async void BreadCrumbContainer_Loaded(object? sender, EventArgs e)
 		BreadCrumbContainer.Loaded -= BreadCrumbContainer_Loaded;
 
 		// Get list of all pages in the NavigationStack that has a selectedPage title
-		List<Page> pages = Navigation.NavigationStack.Select(x => x).Where(x => !string.IsNullOrEmpty(x?.Title)).ToList();
+		List<Page> pages = [.. Navigation.NavigationStack.Select(x => x).Where(x => !string.IsNullOrEmpty(x?.Title))];
 
 		// If any pages, make the control visible
 		BreadCrumbsScrollView.IsVisible = pages.Count > 0;
@@ -332,13 +332,13 @@ async Task GoBack(Page selectedPage)
 		}
 
 		// Get all pages after and including selectedPage
-		List<Page> pages = Navigation.NavigationStack.SkipWhile(x => x != selectedPage).ToList();
+		List<Page> pages = [.. Navigation.NavigationStack.SkipWhile(x => x != selectedPage)];
 
 		// Remove selectedPage
 		pages.Remove(selectedPage);
 
 		// Remove current page (this will be removed with a PopAsync after all other relevant pages are removed)
-		pages = pages.Take(pages.Count - 1).ToList();
+		pages = [.. pages.Take(pages.Count - 1)];
 
 		// Remove all pages left in list (i.e. all pages after selectedPage, minus the current page)
 		foreach(Page page in pages)