Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.Graphics/RHI/IRenderer.cs

@@ -0,0 +1,43 @@
+using Ghost.Graphics.RHI;
+
+namespace Ghost.Graphics.RHI;
+
+/// <summary>
+/// High-level renderer interface that uses RHI abstractions
+/// </summary>
+public interface IRenderer : IDisposable
+{
+    /// <summary>
+    /// Sets the render target for this renderer
+    /// </summary>
+    /// <param name="renderTarget">Render target to render into</param>
+    void SetRenderTarget(IRenderTarget? renderTarget);
+
+    /// <summary>
+    /// Sets the swap chain for this renderer
+    /// </summary>
+    /// <param name="swapChain">Swap chain for presentation</param>
+    void SetSwapChain(ISwapChain? swapChain);
+
+    /// <summary>
+    /// Executes any pending resize operations
+    /// </summary>
+    void ExecutePendingResize();
+
+    /// <summary>
+    /// Renders a frame
+    /// </summary>
+    void Render();
+
+    /// <summary>
+    /// Requests a resize operation
+    /// </summary>
+    /// <param name="width">New width</param>
+    /// <param name="height">New height</param>
+    void RequestResize(uint width, uint height);
+
+    /// <summary>
+    /// Waits for the GPU to complete all work
+    /// </summary>
+    void WaitIdle();
+}