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>

Services/DragDropService.cs

@@ -402,115 +402,3 @@ public class DragDropService : IDisposable
 
     #endregion
 }
-
-/// <summary>
-/// Contains data for a drag operation.
-/// </summary>
-public class DragData
-{
-    /// <summary>
-    /// Gets or sets the source window.
-    /// </summary>
-    public nint SourceWindow { get; set; }
-
-    /// <summary>
-    /// Gets or sets the supported MIME types.
-    /// </summary>
-    public nint[] SupportedTypes { get; set; } = Array.Empty<nint>();
-
-    /// <summary>
-    /// Gets or sets the text data.
-    /// </summary>
-    public string? Text { get; set; }
-
-    /// <summary>
-    /// Gets or sets the file paths.
-    /// </summary>
-    public string[]? FilePaths { get; set; }
-
-    /// <summary>
-    /// Gets or sets custom data.
-    /// </summary>
-    public object? Data { get; set; }
-}
-
-/// <summary>
-/// Event args for drag events.
-/// </summary>
-public class DragEventArgs : EventArgs
-{
-    /// <summary>
-    /// Gets the drag data.
-    /// </summary>
-    public DragData Data { get; }
-
-    /// <summary>
-    /// Gets the X coordinate.
-    /// </summary>
-    public int X { get; }
-
-    /// <summary>
-    /// Gets the Y coordinate.
-    /// </summary>
-    public int Y { get; }
-
-    /// <summary>
-    /// Gets or sets whether the drop is accepted.
-    /// </summary>
-    public bool Accepted { get; set; }
-
-    /// <summary>
-    /// Gets or sets the allowed action.
-    /// </summary>
-    public DragAction AllowedAction { get; set; }
-
-    /// <summary>
-    /// Gets or sets the accepted action.
-    /// </summary>
-    public DragAction AcceptedAction { get; set; } = DragAction.Copy;
-
-    public DragEventArgs(DragData data, int x, int y)
-    {
-        Data = data;
-        X = x;
-        Y = y;
-    }
-}
-
-/// <summary>
-/// Event args for drop events.
-/// </summary>
-public class DropEventArgs : EventArgs
-{
-    /// <summary>
-    /// Gets the drag data.
-    /// </summary>
-    public DragData Data { get; }
-
-    /// <summary>
-    /// Gets the dropped data as string.
-    /// </summary>
-    public string? DroppedData { get; }
-
-    /// <summary>
-    /// Gets or sets whether the drop was handled.
-    /// </summary>
-    public bool Handled { get; set; }
-
-    public DropEventArgs(DragData data, string? droppedData)
-    {
-        Data = data;
-        DroppedData = droppedData;
-    }
-}
-
-/// <summary>
-/// Drag action types.
-/// </summary>
-public enum DragAction
-{
-    None,
-    Copy,
-    Move,
-    Link
-}