Fix Views: SkiaEntry, SkiaEditor, SkiaShell, SkiaWebView

- SkiaEntry.cs: TextProperty BindingMode.OneWay (was TwoWay)
- SkiaEditor.cs: All BindingModes corrected (Text=OneWay, others=TwoWay)
- SkiaShell.cs: Added FlyoutTextColor, ContentBackgroundColor properties,
  route registration system, query parameter support, OnScroll handler
- SkiaWebView.cs: Full rewrite with X11 embedding, GTK window positioning,
  hardware acceleration settings, load-changed callbacks, position tracking

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

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

Views/SkiaEntry.cs

@@ -24,7 +24,7 @@ public class SkiaEntry : SkiaView
             typeof(string),
             typeof(SkiaEntry),
             "",
-            BindingMode.TwoWay,
+            BindingMode.OneWay,
             propertyChanged: (b, o, n) => ((SkiaEntry)b).OnTextPropertyChanged((string)o, (string)n));
 
     /// <summary>