Prevent collision between KUnifiedPush DBus and KRunner DBus

These share the same D-Bus service name (org.kde.neochat) which comes
with a fun little addition: KRunner activation! While this is not a
problem while NeoChat is running - since it's already registered - this
becomes an issue while searching for NeoChat in something like the
Kickoff. The Kickoff (and consequently, KRunner) tries to activate the
NeoChat D-Bus service which runs our unified push parts.

This introduces a "FakeRunner" which watches closely for calls to the
KRunner interface while we're in unified push mode (or directly called
from D-Bus but not running) so it quits immediately.

src/fakerunner.cpp

@@ -0,0 +1,36 @@
+// SPDX-FileCopyrightText: 2024 Joshua Goins <josh@redstrate.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#include "fakerunner.h"
+
+#include <QCoreApplication>
+#include <QDBusMetaType>
+
+Q_SCRIPTABLE RemoteActions FakeRunner::Actions()
+{
+    QCoreApplication::quit();
+    return {};
+}
+
+Q_SCRIPTABLE RemoteMatches FakeRunner::Match(const QString &searchTerm)
+{
+    QCoreApplication::quit();
+    return {};
+}
+
+Q_SCRIPTABLE void FakeRunner::Run(const QString &id, const QString &actionId)
+{
+    QCoreApplication::quit();
+}
+
+FakeRunner::FakeRunner()
+    : QObject()
+{
+    qDBusRegisterMetaType<RemoteMatch>();
+    qDBusRegisterMetaType<RemoteMatches>();
+    qDBusRegisterMetaType<RemoteAction>();
+    qDBusRegisterMetaType<RemoteActions>();
+    qDBusRegisterMetaType<RemoteImage>();
+}
+
+#include "moc_fakerunner.cpp"