Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Proxies/TrainingAreaBaseOC/connection_handler_tcp.h

@@ -0,0 +1,48 @@
+
+
+
+#pragma once
+
+#include <QObject>
+#include <QTcpSocket>
+
+#include <LtsUtilsCore/sfm_bytemessage_converter.h>
+#include "logger.h"
+
+class QTimer;
+namespace TrainingAreaBaseOC
+{
+
+class ConnectionHandlerTcp : public QObject
+{
+  Q_OBJECT
+
+public:
+  explicit ConnectionHandlerTcp();
+  ~ConnectionHandlerTcp();
+
+  bool init();
+  bool send(const LtsUtils::SfmMessage &message);
+  bool open();
+  void close();
+
+  bool isOpen() const;
+
+signals:
+  void received(const LtsUtils::SfmMessage &message);
+  void disconnectedFromEq();
+
+
+private slots:
+  void read();
+  void handleError(QAbstractSocket::SocketError error);
+
+private:
+  QTcpSocket *m_socket = nullptr;
+  QTimer     *m_timer = nullptr;
+  QByteArray  m_currentDataRead;
+
+  LOGGER_T m_logger;
+};
+
+}