加入支持触摸的辅助方法和测试代码

src/Shared/HandyControlDemo_Shared/Window/TouchDragMoveWindow.xaml

@@ -0,0 +1,11 @@
+<Window x:Class="HandyControlDemo.Window.TouchDragMoveWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        WindowStartupLocation="CenterScreen"
+        xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
+        xmlns:ex="clr-namespace:HandyControlDemo.Tools.Extension"
+        Title="{ex:Lang Key={x:Static langs:LangKeys.Title}}" 
+        Height="450" 
+        Width="800" 
+        Icon="/HandyControlDemo;component/Resources/Img/icon.ico">
+</Window>