Abstracted RenderWindow for platform-specific implementations

Xune.Wpf/MainWindow.xaml

@@ -0,0 +1,13 @@
+<Window x:Class="Xune.Wpf.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:Xune.Wpf"
+        xmlns:sk="clr-namespace:SkiaSharp.Views.WPF;assembly=SkiaSharp.Views.WPF"
+        mc:Ignorable="d"
+        Title="Xune" Height="450" Width="800">
+    <Grid>
+        <sk:SKElement x:Name="Canvas" Grid.Row="1"/>
+    </Grid>
+</Window>