Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.UnitTest/Windows/DebugOutputWindow.xaml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Window
+    x:Class="Ghost.UnitTest.Windows.DebugOutputWindow"
+    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="DebugOutputWindow"
+    mc:Ignorable="d">
+
+    <Window.SystemBackdrop>
+        <MicaBackdrop />
+    </Window.SystemBackdrop>
+
+    <Grid>
+        <controls:DebugConsole HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
+    </Grid>
+</Window>