Refactors sample app and enhances tap gesture control

*   Removes the feature enhancement plan, indicating completion of planned work.
*   Redesigns the sample application into a dedicated "PDF Experience" page.
    *   Improves the UI and UX with modern styling and collapsible sections, integrating the .NET MAUI Community Toolkit.
    *   Replaces the default MAUI starter page with the PDF viewer as the main content.
*   Adds an `EnableTapGestures` property to control whether custom tap events are raised or if native link navigation is prioritized.
    *   Allows more explicit control over user interaction with PDF links and tap events.
    *   Android's tap listener now correctly differentiates between custom tap events and native link handling.
    *   iOS conditionally registers or de-registers its tap gesture recognizer based on this property.
*   Enhances the sample app's `LinkTapped` event handler to provide interactive handling of PDF links, including opening external URIs or navigating to internal document pages.
*   Removes the `BackgroundColor` bindable property from the PDF view control's public API.
*   Updates Android Kotlin standard library and MAUI Controls dependencies.

Author: michaelstonis

FEATURE_ENHANCEMENT_PLAN.md

@@ -6,9 +6,10 @@
     xmlns:local="clr-namespace:MauiPdfViewerSample"
     Title="MauiPdfViewerSample">
 
+    <!-- Make PdfTestPage the app's main ShellContent -->
     <ShellContent
-        Title="Home"
-        ContentTemplate="{DataTemplate local:MainPage}"
-        Route="MainPage" />
+        Title="PDF Viewer"
+        ContentTemplate="{DataTemplate local:PdfTestPage}"
+        Route="PdfTestPage" />
 
 </Shell>

samples/MauiPdfViewerSample/AppShell.xaml

@@ -44,6 +44,7 @@
 	</ItemGroup>
 
 	<ItemGroup>
+		<PackageReference Include="CommunityToolkit.Maui" Version="12.3.0" />
 		<PackageReference Include="Microsoft.Maui.Controls" Version="9.0.120" />
 		<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="9.0.0" />
 	</ItemGroup>

samples/MauiPdfViewerSample/MainPage.xaml

@@ -1,4 +1,5 @@
-using Microsoft.Extensions.Logging;
+using CommunityToolkit.Maui;
+using Microsoft.Extensions.Logging;
 using MauiNativePdfView;
 
 namespace MauiPdfViewerSample;
@@ -10,6 +11,7 @@ public static MauiApp CreateMauiApp()
 		var builder = MauiApp.CreateBuilder();
 		builder
 			.UseMauiApp<App>()
+			.UseMauiCommunityToolkit()
 			.UseMauiNativePdfView()
 			.ConfigureFonts(fonts =>
 			{