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-kwidgetsaddons/source/tests/kcollapsiblegroupboxtest.cpp

@@ -0,0 +1,74 @@
+/*
+    This file is part of the KDE libraries
+    SPDX-FileCopyrightText: 2015 David Edmundson <davidedmundson@kde.org>
+    Based on test program by Dominik Haumann <dhaumann@kde.org>
+
+    SPDX-License-Identifier: LGPL-2.1-or-later
+*/
+#include <QApplication>
+#include <QCheckBox>
+#include <QLabel>
+#include <QLineEdit>
+#include <QVBoxLayout>
+#include <QWidget>
+
+#include "kdatepicker.h"
+#include <kcollapsiblegroupbox.h>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QWidget mainWindow;
+
+    QVBoxLayout mainWindowLayout(&mainWindow);
+
+    // add a layout with many items to make sure it doesn't shuffle them weirdly when animating
+    {
+        auto groupBox = new KCollapsibleGroupBox;
+        groupBox->setTitle(QStringLiteral("&Advanced Options"));
+
+        auto *innerLayout = new QVBoxLayout(groupBox);
+        for (int i = 0; i < 6; i++) {
+            auto checkBox = new QCheckBox(QStringLiteral("Some text"));
+            innerLayout->addWidget(checkBox);
+        }
+        auto checkBox = new QCheckBox(QStringLiteral("Some really long text that goes on and on and on for ever and ever"));
+        innerLayout->addWidget(checkBox);
+
+        auto label = new QLabel(groupBox);
+        label->setText(QStringLiteral("Some input field:"));
+        // Word-wrapping in labels triggers a bug in the layout positioning.
+        label->setWordWrap(true);
+        innerLayout->addWidget(label);
+
+        auto lineEdit = new QLineEdit(groupBox);
+        innerLayout->addWidget(lineEdit);
+
+        auto hiddenCheckBox = new QCheckBox(QStringLiteral("This will be always hidden"));
+        innerLayout->addWidget(hiddenCheckBox);
+        hiddenCheckBox->hide();
+
+        mainWindowLayout.addWidget(groupBox);
+    }
+
+    // another item which should expand to fill width
+    {
+        auto groupBox = new KCollapsibleGroupBox;
+        groupBox->setTitle(QStringLiteral("Pick a &date"));
+
+        auto innerLayout = new QVBoxLayout(groupBox);
+        auto datePicker = new KDatePicker();
+        innerLayout->addWidget(datePicker);
+        mainWindowLayout.addWidget(groupBox);
+    }
+
+    mainWindowLayout.addStretch();
+
+    mainWindow.resize(400, 300);
+    mainWindow.show();
+
+    return app.exec();
+}
+
+// kate: replace-tabs on;