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/kwin/source/autotests/integration/fakes/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory(org.kde.kdecoration3)

local/recipes/kde/kwin/source/autotests/integration/fakes/org.kde.kdecoration3/CMakeLists.txt

@@ -0,0 +1,15 @@
+########################################################
+# FakeDecoWithShadows
+########################################################
+add_library(fakedecoshadows MODULE fakedecoration_with_shadows.cpp)
+set_target_properties(fakedecoshadows PROPERTIES
+    PREFIX ""
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/fakes/org.kde.kdecoration3")
+target_link_libraries(fakedecoshadows
+    PUBLIC
+        Qt::Core
+        Qt::Gui
+    PRIVATE
+        KDecoration3::KDecoration
+        KF6::CoreAddons)
+

local/recipes/kde/kwin/source/autotests/integration/fakes/org.kde.kdecoration3/fakedecoration_with_shadows.cpp

@@ -0,0 +1,64 @@
+/*
+    KWin - the KDE window manager
+    This file is part of the KDE project.
+
+    SPDX-FileCopyrightText: 2018 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
+
+    SPDX-License-Identifier: GPL-2.0-or-later
+*/
+
+#include <QPainter>
+
+#include <KDecoration3/Decoration>
+#include <KPluginFactory>
+
+class FakeDecoWithShadows : public KDecoration3::Decoration
+{
+    Q_OBJECT
+
+public:
+    explicit FakeDecoWithShadows(QObject *parent = nullptr, const QVariantList &args = QVariantList())
+        : Decoration(parent, args)
+    {
+    }
+    ~FakeDecoWithShadows() override
+    {
+    }
+
+    void paint(QPainter *painter, const QRectF &repaintRegion) override
+    {
+    }
+
+public Q_SLOTS:
+    bool init() override
+    {
+        const int shadowSize = 128;
+        const int offsetTop = 64;
+        const int offsetLeft = 48;
+        const QRect shadowRect(0, 0, 4 * shadowSize + 1, 4 * shadowSize + 1);
+
+        QImage shadowTexture(shadowRect.size(), QImage::Format_ARGB32_Premultiplied);
+        shadowTexture.fill(Qt::transparent);
+
+        const QMargins padding(
+            shadowSize - offsetLeft,
+            shadowSize - offsetTop,
+            shadowSize + offsetLeft,
+            shadowSize + offsetTop);
+
+        auto decoShadow = std::make_shared<KDecoration3::DecorationShadow>();
+        decoShadow->setPadding(padding);
+        decoShadow->setInnerShadowRect(QRect(shadowRect.center(), QSize(1, 1)));
+        decoShadow->setShadow(shadowTexture);
+
+        setShadow(decoShadow);
+        return true;
+    }
+};
+
+K_PLUGIN_FACTORY_WITH_JSON(
+    FakeDecoWithShadowsFactory,
+    "fakedecoration_with_shadows.json",
+    registerPlugin<FakeDecoWithShadows>();)
+
+#include "fakedecoration_with_shadows.moc"

local/recipes/kde/kwin/source/autotests/integration/fakes/org.kde.kdecoration3/fakedecoration_with_shadows.json

@@ -0,0 +1,11 @@
+{
+    "KPlugin": {
+        "Description": "Window decoration to test shadow tile overlaps",
+        "EnabledByDefault": false,
+        "Id": "org.kde.test.fakedecowithshadows",
+        "Name": "Fake Decoration With Shadows"
+    },
+    "org.kde.kdecoration2": {
+        "blur": false
+    }
+}