Fix NavigationPageHandler, StepperHandler, TimePickerHandler from decompiled

NavigationPageHandler:
- Added LoadToolbarIcon() method for PNG/SVG toolbar icons
- Added icon loading in MapToolbarItems()
- Fixed OnVirtualViewPushed to set Title and handle null content
- Fixed animation parameters to match decompiled

StepperHandler:
- Added MapIncrement() and MapIsEnabled() methods
- Added dark theme color support in ConnectHandler

TimePickerHandler:
- Added dark theme color support in ConnectHandler

SkiaPage:
- Added Icon property to SkiaToolbarItem class

Also added Svg.Skia package reference.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Views/SkiaPage.cs

@@ -449,6 +449,7 @@ public class SkiaContentPage : SkiaPage
 public class SkiaToolbarItem
 {
     public string Text { get; set; } = "";
+    public SKBitmap? Icon { get; set; }
     public SkiaToolbarItemOrder Order { get; set; } = SkiaToolbarItemOrder.Primary;
     public System.Windows.Input.ICommand? Command { get; set; }
     public SKRect HitBounds { get; set; }