Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

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

qt5-before/dlbo/Lts/Viewer/SituationMap/Common/exception.h

@@ -0,0 +1,93 @@
+/**
+**
+** @RDE_HEADER@
+** Implementation of Splines
+** $Id$
+** $HeadURL$
+** $Author$
+** -----------------------------------------------------------------------------------------------
+**
+** Hardware-Environment: Intel-PC
+** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
+**
+** Language ........: C++ 11
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Author ...........: Joerg Turla, SPD G, Tel. 3132
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Notes .........:
+**
+**   19.06.2012, JT  : Urversion for use in VIntel project
+**   12.08.2015, JT  : adapted to SituationMap
+**
+** -----------------------------------------------------------------------------------------------
+*/
+
+#pragma once
+
+
+#include <QtCore/QString>
+
+namespace SituationMap
+{
+/**
+   \class   Exception exception.h
+   \brief   Basisklasse for Exception-Handling
+
+   The class Exception defines a very simple exception handler, that will be able to return
+   a string message when an exception is thrown
+*/
+
+class Exception
+{
+public:
+
+  Exception()
+    : _message(QLatin1String("Error"))
+  {}
+
+  Exception(const Exception &) = default;
+
+  explicit Exception(const QString    &msg)
+    : _message(msg)
+  {}
+
+
+  // explicit is not used here because
+  // throw SituationMap::Exception(__FILE__, __LINE__, "Message" );
+  // will become more complicated
+
+  Exception(const char *Source
+            , unsigned int lineNo
+            , const char *msg)
+    : Exception(QLatin1String(Source), lineNo, QLatin1String(msg))
+  {}
+
+  Exception(const char *Source
+            , unsigned int lineNo
+            , const QString &msg)
+    : Exception(QLatin1String(Source), lineNo, msg)
+  {}
+
+  Exception(const QString &Source
+            , unsigned int lineNo
+            , const QString &msg)
+    : _message(QStringLiteral("\"%1\" in %2 at %3").arg(msg, Source).arg(lineNo))
+  {}
+
+  ~Exception() = default;
+  Exception &operator = (const Exception &e) = default;
+
+
+  QString getMessage() const { return _message; } //!< returns a specific error message as QString
+
+protected:
+
+  QString _message;
+
+};
+
+} // namespace SituationMap