Add GPUVertexLayout to graphics backends

Source/Engine/GraphicsDevice/Null/GPUVertexLayoutNull.h

@@ -0,0 +1,22 @@
+// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#if GRAPHICS_API_NULL
+
+#include "Engine/Graphics/Shaders/GPUVertexLayout.h"
+
+/// <summary>
+/// Vertex layout for Null backend.
+/// </summary>
+class GPUVertexLayoutNull : public GPUVertexLayout
+{
+public:
+	GPUVertexLayoutNull(const Elements& elements)
+		: GPUVertexLayout()
+	{
+        _elements = elements;
+	}
+};
+
+#endif