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-kdbusaddons/source/src/kupdatelaunchenvironmentjob.h

@@ -0,0 +1,60 @@
+/*
+    SPDX-FileCopyrightText: 2020 Kai Uwe Broulik <kde@broulik.de>
+    SPDX-FileCopyrightText: 2021 David Edmundson <davidedmundson@kde.org>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#ifndef KUPDATELAUNCHENVIRONMENTJOB_H
+#define KUPDATELAUNCHENVIRONMENTJOB_H
+
+#include <kdbusaddons_export.h>
+
+#include <QProcessEnvironment>
+
+#include <memory>
+
+class QString;
+class KUpdateLaunchEnvironmentJobPrivate;
+
+/**
+ * @class KUpdateLaunchEnvironmentJob updatelaunchenvironmentjob.h <KUpdateLaunchEnvironmentJob>
+ *
+ * Job for updating the launch environment.
+ *
+ * This job adds or updates an environment variable in process environment that will be used
+ * when a process is launched:
+ * This includes:
+ *  - DBus activation
+ *  - Systemd units
+ *  - Plasma-session
+ *
+ * Environment variables are sanitized before uploading.
+ *
+ * This object deletes itself after completion, similar to KJobs
+ *
+ * Porting from KF5 to KF6:
+ *
+ * The class UpdateLaunchEnvironmentJob was renamed to KUpdateLaunchEnvironmentJob.
+ *
+ * @since 6.0
+ */
+class KDBUSADDONS_EXPORT KUpdateLaunchEnvironmentJob : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit KUpdateLaunchEnvironmentJob(const QProcessEnvironment &environment);
+    ~KUpdateLaunchEnvironmentJob() override;
+
+Q_SIGNALS:
+    void finished();
+
+private:
+    KDBUSADDONS_NO_EXPORT void start();
+
+private:
+    std::unique_ptr<KUpdateLaunchEnvironmentJobPrivate> const d;
+};
+
+#endif