Verify Views files against decompiled, extract embedded types

Fixed files:
- SkiaImageButton.cs: Added SVG support with multi-path search
- SkiaNavigationPage.cs: Added LinuxApplication.IsGtkMode check
- SkiaRefreshView.cs: Added ICommand support (Command, CommandParameter)
- SkiaTemplatedView.cs: Added missing using statements

Extracted embedded types to separate files (matching decompiled pattern):
- From SkiaMenuBar.cs: MenuBarItem, MenuItem, SkiaMenuFlyout, MenuItemClickedEventArgs
- From SkiaNavigationPage.cs: NavigationEventArgs
- From SkiaTabbedPage.cs: TabItem
- From SkiaVisualStateManager.cs: SkiaVisualStateGroupList, SkiaVisualStateGroup, SkiaVisualState, SkiaVisualStateSetter
- From SkiaSwipeView.cs: SwipeItem, SwipeStartedEventArgs, SwipeEndedEventArgs
- From SkiaFlyoutPage.cs: FlyoutLayoutBehavior (already separate)
- From SkiaIndicatorView.cs: IndicatorShape (already separate)
- From SkiaBorder.cs: SkiaFrame
- From SkiaCarouselView.cs: PositionChangedEventArgs
- From SkiaCollectionView.cs: SkiaSelectionMode, ItemsLayoutOrientation
- From SkiaContentPresenter.cs: LayoutAlignment

Verified matching decompiled:
- SkiaContextMenu.cs, SkiaFlexLayout.cs, SkiaGraphicsView.cs

Build: 0 errors

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

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

Views/SkiaVisualStateManager.cs

@@ -123,94 +123,3 @@ public static class SkiaVisualStateManager
         }
     }
 }
-
-/// <summary>
-/// A list of visual state groups.
-/// </summary>
-public class SkiaVisualStateGroupList : List<SkiaVisualStateGroup>
-{
-}
-
-/// <summary>
-/// A group of mutually exclusive visual states.
-/// </summary>
-public class SkiaVisualStateGroup
-{
-    /// <summary>
-    /// Gets or sets the name of this group.
-    /// </summary>
-    public string Name { get; set; } = "";
-
-    /// <summary>
-    /// Gets the collection of states in this group.
-    /// </summary>
-    public List<SkiaVisualState> States { get; } = new();
-
-    /// <summary>
-    /// Gets or sets the currently active state.
-    /// </summary>
-    public SkiaVisualState? CurrentState { get; set; }
-}
-
-/// <summary>
-/// Represents a single visual state with its setters.
-/// </summary>
-public class SkiaVisualState
-{
-    /// <summary>
-    /// Gets or sets the name of this state.
-    /// </summary>
-    public string Name { get; set; } = "";
-
-    /// <summary>
-    /// Gets the collection of setters for this state.
-    /// </summary>
-    public List<SkiaVisualStateSetter> Setters { get; } = new();
-}
-
-/// <summary>
-/// Sets a property value when a visual state is active.
-/// </summary>
-public class SkiaVisualStateSetter
-{
-    /// <summary>
-    /// Gets or sets the property to set.
-    /// </summary>
-    public BindableProperty? Property { get; set; }
-
-    /// <summary>
-    /// Gets or sets the value to set.
-    /// </summary>
-    public object? Value { get; set; }
-
-    // Store original value for unapply
-    private object? _originalValue;
-    private bool _hasOriginalValue;
-
-    /// <summary>
-    /// Applies this setter to the target view.
-    /// </summary>
-    public void Apply(SkiaView view)
-    {
-        if (Property == null) return;
-
-        // Store original value if not already stored
-        if (!_hasOriginalValue)
-        {
-            _originalValue = view.GetValue(Property);
-            _hasOriginalValue = true;
-        }
-
-        view.SetValue(Property, Value);
-    }
-
-    /// <summary>
-    /// Unapplies this setter, restoring the original value.
-    /// </summary>
-    public void Unapply(SkiaView view)
-    {
-        if (Property == null || !_hasOriginalValue) return;
-
-        view.SetValue(Property, _originalValue);
-    }
-}