Advance Wayland and KDE package bring-up

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/kde/kf6-kwindowsystem/source/src/kwindowshadow_p.h

@@ -0,0 +1,62 @@
+/*
+    SPDX-FileCopyrightText: 2019 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+#ifndef KWINDOWSHADOW_P_H
+#define KWINDOWSHADOW_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the KF API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "kwindowshadow.h"
+
+#include <QPointer>
+
+class KWINDOWSYSTEM_EXPORT KWindowShadowTilePrivate
+{
+public:
+    virtual ~KWindowShadowTilePrivate();
+
+    virtual bool create() = 0;
+    virtual void destroy() = 0;
+
+    static KWindowShadowTilePrivate *get(const KWindowShadowTile *tile);
+
+    QImage image;
+    bool isCreated = false;
+};
+
+class KWINDOWSYSTEM_EXPORT KWindowShadowPrivate
+{
+public:
+    virtual ~KWindowShadowPrivate();
+
+    virtual bool create() = 0;
+    virtual void destroy() = 0;
+
+    bool prepareTiles();
+
+    QPointer<QWindow> window;
+    KWindowShadowTile::Ptr leftTile;
+    KWindowShadowTile::Ptr topLeftTile;
+    KWindowShadowTile::Ptr topTile;
+    KWindowShadowTile::Ptr topRightTile;
+    KWindowShadowTile::Ptr rightTile;
+    KWindowShadowTile::Ptr bottomRightTile;
+    KWindowShadowTile::Ptr bottomTile;
+    KWindowShadowTile::Ptr bottomLeftTile;
+    QMargins padding;
+    bool isCreated = false;
+};
+
+#endif // KWINDOWSHADOW_P_H