Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.UnitTest/Windows/GraphicsTestWindow.xaml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Window
+    x:Class="Ghost.UnitTest.Windows.GraphicsTestWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="using:Ghost.UnitTest.Controls"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:local="using:Ghost.UnitTest.Windows"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    Title="GraphicsTestWindow"
+    mc:Ignorable="d">
+
+    <Window.SystemBackdrop>
+        <MicaBackdrop />
+    </Window.SystemBackdrop>
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="300" MinHeight="150" />
+        </Grid.RowDefinitions>
+
+        <!--  Main test content area  -->
+        <SwapChainPanel
+            x:Name="Panel"
+            Grid.Row="0"
+            HorizontalAlignment="Stretch"
+            VerticalAlignment="Stretch" />
+
+        <!--  Splitter  -->
+        <Border
+            Grid.Row="1"
+            Height="4"
+            HorizontalAlignment="Stretch"
+            Background="{ThemeResource SystemControlBackgroundBaseLowBrush}" />
+
+        <!--  Debug Console  -->
+        <Border
+            Grid.Row="2"
+            Background="{ThemeResource SystemControlBackgroundAltHighBrush}"
+            BorderBrush="{ThemeResource SystemControlForegroundBaseLowBrush}"
+            BorderThickness="0,1,0,0">
+            <controls:DebugConsole x:Name="DebugConsole" />
+        </Border>
+    </Grid>
+</Window>