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/qml/CMakeLists.txt

@@ -0,0 +1,6 @@
+ecm_add_qml_module(KWindowSystem URI "org.kde.kwindowsystem" VERSION 1.0 GENERATE_PLUGIN_SOURCE)
+
+target_sources(KWindowSystem PRIVATE types.h)
+target_link_libraries(KWindowSystem PRIVATE Qt::Qml KF6::WindowSystem)
+
+ecm_finalize_qml_module(KWindowSystem DESTINATION ${KDE_INSTALL_QMLDIR})

local/recipes/kde/kf6-kwindowsystem/source/src/qml/examples/compositingActive.qml

@@ -0,0 +1,18 @@
+/*
+    SPDX-FileCopyrightText: 2023 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+import QtQuick 2.15
+import QtQuick.Window 2.15
+import QtQuick.Controls 2.15 as QQC2
+
+import org.kde.kwindowsystem 1.0
+
+Item {
+    QQC2.Label {
+        anchors.centerIn: parent
+        text: "Compositing active: " + KX11Extras.compositingActive
+    }
+}

local/recipes/kde/kf6-kwindowsystem/source/src/qml/examples/forceActiveWindow.qml

@@ -0,0 +1,21 @@
+/*
+    SPDX-FileCopyrightText: 2023 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+import QtQuick 2.15
+import QtQuick.Window 2.15
+import QtQuick.Controls 2.15 as QQC2
+
+import org.kde.kwindowsystem 1.0
+
+Item {
+
+    QQC2.Button {
+        anchors.centerIn: parent
+        text: "Force"
+        // Forcing the current window to be active it a bit silly, but it illustrates how to use the API
+        onClicked: KX11Extras.forceActiveWindow(Window.window)
+    }
+}

local/recipes/kde/kf6-kwindowsystem/source/src/qml/examples/platform.qml

@@ -0,0 +1,26 @@
+/*
+    SPDX-FileCopyrightText: 2023 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+import QtQuick 2.15
+import QtQuick.Window 2.15
+import QtQuick.Controls 2.15 as QQC2
+
+import org.kde.kwindowsystem 1.0
+
+Item {
+
+    Column {
+        anchors.centerIn: parent
+
+        QQC2.Label {
+            text: "Is X11: " + KWindowSystem.isPlatformX11
+        }
+
+        QQC2.Label {
+            text: "Is Wayland: " + KWindowSystem.isPlatformWayland
+        }
+    }
+}

local/recipes/kde/kf6-kwindowsystem/source/src/qml/examples/showingDesktop.qml

@@ -0,0 +1,35 @@
+/*
+    SPDX-FileCopyrightText: 2023 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+import QtQuick 2.15
+import QtQuick.Window 2.15
+import QtQuick.Controls 2.15 as QQC2
+
+import org.kde.kwindowsystem 1.0
+
+Item {
+
+    Connections {
+        target: KWindowSystem
+
+        function onShowingDesktopChanged() {
+            console.log("Showing desktop changed to " + KWindowSystem.showingDesktop)
+        }
+    }
+
+    Column {
+        anchors.centerIn: parent
+
+        QQC2.Label {
+            text: "Showing desktop: " + KWindowSystem.showingDesktop
+        }
+
+        QQC2.Button {
+            text: "Show"
+            onClicked: KWindowSystem.showingDesktop = true
+        }
+    }
+}

local/recipes/kde/kf6-kwindowsystem/source/src/qml/types.h

@@ -0,0 +1,49 @@
+/*
+    SPDX-FileCopyrightText: 2024 Nicolas Fella <nicolas.fella@gmx.de>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+
+#ifndef KWINDOWSYSTEM_QML_TYPES_H
+#define KWINDOWSYSTEM_QML_TYPES_H
+
+#include <QQmlEngine>
+
+#include <KWindowSystem>
+
+#include <config-kwindowsystem.h>
+#if KWINDOWSYSTEM_HAVE_X11
+#include <KX11Extras>
+#endif
+
+struct KWindowSystemForeign {
+    Q_GADGET
+    QML_NAMED_ELEMENT(KWindowSystem)
+    QML_SINGLETON
+    QML_FOREIGN(KWindowSystem)
+
+public:
+    static KWindowSystem *create(QQmlEngine *, QJSEngine *)
+    {
+        QQmlEngine::setObjectOwnership(KWindowSystem::self(), QQmlEngine::CppOwnership);
+        return KWindowSystem::self();
+    }
+};
+
+#if KWINDOWSYSTEM_HAVE_X11
+struct KX11ExtrasForeign {
+    Q_GADGET
+    QML_NAMED_ELEMENT(KX11Extras)
+    QML_SINGLETON
+    QML_FOREIGN(KX11Extras)
+
+public:
+    static KX11Extras *create(QQmlEngine *, QJSEngine *)
+    {
+        QQmlEngine::setObjectOwnership(KX11Extras::self(), QQmlEngine::CppOwnership);
+        return KX11Extras::self();
+    }
+};
+#endif
+
+#endif