Integration and add heat map demo

- Implemented OpenStreetMap using WebView with Leaflet.js
- Added OpenStreetMapView component with interactive map functionality
- Created heat map visualization with color-coded intensity
- Added 30 dummy location points around San Francisco Bay Area
- Implemented location tracking with real-time pin placement
- Added comprehensive UI with two-row button layout
- Features: Start/Stop tracking, Center map, Demo heat map, Clear demo, Reset map
- Added location count display and confirmation dialogs
- Updated project structure and documentation
- All functionality tested and working on Android emulator

LocationTrackerApp/App.xaml.cs

@@ -0,0 +1,28 @@
+using LocationTrackerApp.Views;
+using LocationTrackerApp.ViewModels;
+using LocationTrackerApp.Data;
+
+namespace LocationTrackerApp;
+
+public partial class App : Application
+{
+	public App()
+	{
+		InitializeComponent();
+	}
+
+	protected override Window CreateWindow(IActivationState? activationState)
+	{
+		// Get services from DI container
+		var dbContext = Handler?.MauiContext?.Services?.GetService<LocationDbContext>();
+		var mainViewModel = Handler?.MauiContext?.Services?.GetService<MainViewModel>();
+		
+		if (dbContext != null)
+		{
+			// Ensure database is created
+			_ = Task.Run(async () => await dbContext.EnsureDatabaseCreatedAsync());
+		}
+
+		return new Window(new AppShell());
+	}
+}