feat: init dbus service structure

Log: 初始化dbus服务结构

src/dbus/applicationservice.cpp

@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+#include "applicationservice.h"
+
+ApplicationService::ApplicationService(QObject *parent)
+    : QObject(parent)
+{
+}
+
+ApplicationService::~ApplicationService() {}
+
+QDBusObjectPath ApplicationService::Launch(const QString &action, const QStringList &fields, const QVariantMap &options)
+{
+    // TODO: impl
+    return {};
+}