Qt6 migration: Fix BUILD_RTI=OFF build errors in TrainingAreaBase

- training_area_telegrams.cpp: Fixed QJsonObject initializer syntax (Qt6 requires {{}} not ({}))
- training_area_telegrams.cpp: Fixed fromJson() methods to access m_* members directly
- training_area_telegrams.cpp: Fixed brace mismatches in multiple toJson() methods
- training_area_telegrams.h: Changed Header struct to public members for consistency
- tx_mixin.cpp: Fixed getEquipmentNumber() template for direct member access
- lts_coordinate.cpp: Added missing #include <iomanip>
- MIGRATION_STATUS.md: Added migration progress tracking document

C++17 constraint enforced due to RTI Connext DDS 7.7.0 incompatibility with C++20+

Build status: BUILD_RTI=OFF successful (0 errors, warnings only)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/ConnectDialog/connect_dialog.h

@@ -4,9 +4,9 @@
 #include "ltsutilsguiconnectdialog_export.h"
 
 #include <LtsWidgets/lts_frameless_dialog.h>
-#include <QObject>
-#include <QTimer>
-#include <QWidget>
+#include <QtCore/QObject>
+#include <QtCore/QTimer>
+#include <QtWidgets/QWidget>
 #include <functional>
 
 namespace Ui

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/ConnectDialog/connect_dialog_nt.h

@@ -4,7 +4,7 @@
 #include "ltsutilsguiconnectdialog_export.h"
 
 #include <LtsWidgets/lts_frameless_dialog.h>
-#include <QObject>
+#include <QtCore/QObject>
 #include <functional>
 
 class QTimer;

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/dds_vector_to_pixmap.cpp

@@ -2,12 +2,12 @@
 
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/dds_vector_to_pixmap.h>
 #include <LtsUtils/LtsUtilsCore/dds_vector.h>
-#include <QBuffer>
-#include <QFile>
-#include <QIcon>
-#include <QImage>
-#include <QPainter>
-#include <QPixmap>
+#include <QtCore/QBuffer>
+#include <QtCore/QFile>
+#include <QtGui/QIcon>
+#include <QtGui/QImage>
+#include <QtGui/QPainter>
+#include <QtGui/QPixmap>
 #include <QSvgRenderer>
 
 namespace LtsUtils

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/dds_vector_to_pixmap.h

@@ -4,8 +4,8 @@
 
 #include <LtsUtils/LtsUtilsCore/ltsutilscore_export.h>
 
-#include <QSize>
-#include <QString>
+#include <QtCore/QSize>
+#include <QtCore/QString>
 #include <cstdint>
 #include <vector>
 

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.cpp

@@ -5,13 +5,13 @@
 #ifdef REQUEST_HELPER_WITH_GUI
 #include <LtsWidgets/lts_global_wait_dialog.h>
 #include <LtsWidgets/lts_message_dialog.h>
-#include <QWidget>
+#include <QtWidgets/QWidget>
 #endif
 
 #include <QEventLoop>
-#include <QJsonDocument>
-#include <QJsonObject>
-#include <QTimer>
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonObject>
+#include <QtCore/QTimer>
 #include <memory>
 
 #define DEBUG

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h

@@ -11,9 +11,9 @@
 #endif
 
 #include <Core/core_types.h>
-#include <QObject>
-#include <QPair>
-#include <QVector>
+#include <QtCore/QObject>
+#include <QtCore/QPair>
+#include <QtCore/QVector>
 #include <functional>
 #include <optional>
 

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/StyleManager/style_manager.cpp

@@ -4,8 +4,8 @@
 
 #include <LtsPluginManager/lts_plugin_loader.h>
 #include <PluginInterfaces/style_plugin_interface.h>
-#include <QDebug>
-#include <QPluginLoader>
+#include <QtCore/QDebug>
+#include <QtCore/QPluginLoader>
 
 namespace LtsUtils
 {

qt6-after/qt6-migrated-legatus/Lts/Common/LtsUtils/LtsUtilsGui/StyleManager/style_manager.h

@@ -4,7 +4,7 @@
 
 #include "ltsutilsguistylemanager_export.h"
 
-#include <QObject>
+#include <QtCore/QObject>
 
 class QPluginLoader;