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>

Hosting/LinuxTicker.cs

@@ -0,0 +1,47 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.Maui.Animations;
+
+namespace Microsoft.Maui.Platform.Linux.Hosting;
+
+internal class LinuxTicker : ITicker
+{
+    private Timer? _timer;
+    private bool _isRunning;
+    private int _maxFps = 60;
+
+    public bool IsRunning => _isRunning;
+
+    public bool SystemEnabled => true;
+
+    public int MaxFps
+    {
+        get => _maxFps;
+        set => _maxFps = Math.Max(1, Math.Min(120, value));
+    }
+
+    public Action? Fire { get; set; }
+
+    public void Start()
+    {
+        if (!_isRunning)
+        {
+            _isRunning = true;
+            var period = TimeSpan.FromMilliseconds(1000.0 / _maxFps);
+            _timer = new Timer(OnTimerCallback, null, TimeSpan.Zero, period);
+        }
+    }
+
+    public void Stop()
+    {
+        _isRunning = false;
+        _timer?.Dispose();
+        _timer = null;
+    }
+
+    private void OnTimerCallback(object? state)
+    {
+        Fire?.Invoke();
+    }
+}