add about and license

mainwindow.cpp

@@ -1,3 +1,10 @@
+/*
+ * GStreamer Camera Viewer
+ * Copyright (c) 2025 Maik Jurischka
+ * Licensed under CC BY-NC-SA 4.0
+ * https://creativecommons.org/licenses/by-nc-sa/4.0/
+ */
+
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include <QHBoxLayout>
@@ -29,10 +36,12 @@ void MainWindow::setupUI()
     m_videoWidget = new VideoViewerWidget(this);
     m_pipelineWidget = new GStreamerPipelineWidget(m_socketClient, this);
     m_cameraWidget = new CameraControlWidget(m_socketClient, this);
+    m_aboutWidget = new AboutWidget(this);
 
     auto* controlTabs = new QTabWidget(this);
     controlTabs->addTab(m_pipelineWidget, "Pipeline Control");
     controlTabs->addTab(m_cameraWidget, "Camera Control");
+    controlTabs->addTab(m_aboutWidget, "About");
 
     auto* mainSplitter = new QSplitter(Qt::Horizontal, this);
     mainSplitter->addWidget(m_videoWidget);