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-kxmlgui/source/src/kswitchlanguagedialog_p.h

@@ -0,0 +1,84 @@
+/*
+    This file is part of the KDE Libraries
+    SPDX-FileCopyrightText: 2007 Krzysztof Lichota <lichota@mimuw.edu.pl>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#ifndef _KSWITCHLANGUAGEDIALOG_H_
+#define _KSWITCHLANGUAGEDIALOG_H_
+
+#include <kxmlgui_export.h>
+
+#include <QDialog>
+
+namespace KDEPrivate
+{
+KXMLGUI_EXPORT void setApplicationSpecificLanguage(const QByteArray &languageCode);
+KXMLGUI_EXPORT void initializeLanguages();
+
+class KSwitchLanguageDialogPrivate;
+
+/**
+ * @short Standard "switch application language" dialog box.
+ *
+ * This class provides "switch application language" dialog box that is used
+ * in KHelpMenu
+ *
+ * @author Krzysztof Lichota (lichota@mimuw.edu.pl)
+ * @internal
+ */
+
+class KSwitchLanguageDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    /**
+     * Constructor. Creates a fully featured "Switch application language" dialog box.
+     * Note that this dialog is made modeless in the KHelpMenu class so
+     * the users may expect a modeless dialog.
+     *
+     * @param parent The parent of the dialog box. You should use the
+     *        toplevel window so that the dialog becomes centered.
+     * @param name Internal name of the widget. This name in not used in the
+     *        caption.
+     * @param modal If false, this widget will be modeless and must be
+     *        made visible using QWidget::show(). Otherwise it will be
+     *        modal and must be made visible using QWidget::exec()
+     */
+    explicit KSwitchLanguageDialog(QWidget *parent = nullptr);
+
+    ~KSwitchLanguageDialog() override;
+
+protected Q_SLOTS:
+    /**
+     * Activated when the Ok button has been clicked.
+     */
+    virtual void slotOk();
+    void slotDefault();
+
+    /**
+        Called when one of language buttons changes state.
+    */
+    virtual void languageOnButtonChanged(const QString &);
+
+    /**
+        Called to add one language button to dialog.
+    */
+    virtual void slotAddLanguageButton();
+
+    /**
+        Called when "Remove" language button is clicked.
+    */
+    virtual void removeButtonClicked();
+
+private:
+    KSwitchLanguageDialogPrivate *const d;
+
+    friend class KSwitchLanguageDialogPrivate;
+};
+
+}
+
+#endif