LibGL+LibGPU+LibSoftGPU: Move StencilConfiguration.h to LibGPU

Userland/Libraries/LibGPU/Config.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Types.h>
+
+#pragma once
+
+namespace GPU {
+
+// FIXME: These 3 types were originally introduced in LibSoftGPU and are currently needed by the device interface.
+//        Once we refactor the interface these should move back into LibSoftGPU.
+using ColorType = u32; // BGRA:8888
+using DepthType = float;
+using StencilType = u8;
+
+}