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/DDS/Generic/generic_base.cpp

@@ -0,0 +1,98 @@
+/**
+  * @RDE_HEADER@
+  * GenericBase
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#include "generic_base.h"
+
+#include <NGLLogger/NGLLoggerBootstrap.h>
+#include <QStringList>
+#include <QMetaMethod>
+
+namespace DDS
+{
+namespace Helper
+{
+
+static inline bool endsWith(std::string const &str, std::string const &end)
+{
+  if (end.size() > str.size())
+    return false;
+  return std::equal(end.rbegin(), end.rend(), str.rbegin());
+}
+
+static inline std::string getSimpleTopicName(const std::string &fqName)
+{
+  const size_t idx = fqName.rfind("::");
+  if (idx == std::string::npos)
+    return fqName;
+  return fqName.substr(idx + 2);
+}
+
+std::string getFunctionTopicName(const std::string &fqName)
+{
+  const std::string ftName = getSimpleTopicName(fqName);
+  static const std::string request("Request");
+  static const std::string reply("Reply");
+  if (endsWith(ftName, request))
+    return ftName.substr(0, ftName.size() - request.size());
+  if (endsWith(ftName, reply))
+    return ftName.substr(0, ftName.size() - reply.size());
+  return ftName;
+}
+
+std::string getShortTopicName(const std::string &fqName)
+{
+  // add short project name instead of long project namespace (with ::)
+  // i. e. Lts::SpatialData => LTS_SpatialData
+  return std::string("LTS_") + getSimpleTopicName(fqName);
+}
+
+QMetaMethod getMethod(NGL::INGLLogger &logger,
+                      QObject *objectToInform,
+                      const char *slotToExecute,
+                      const char *signalSignature,
+                      bool bWarnOnEmptySlot)
+{
+  QMetaMethod ret;
+  if(!slotToExecute || !objectToInform)
+  {
+    if(bWarnOnEmptySlot)
+      WARNING_LOG(logger) << "invalid arguments to getMethod()";
+    return ret;
+  }
+
+  int slotCode = slotToExecute[0] - '0';
+  // check if it's really a signal or slot
+  if(slotCode != QSLOT_CODE && slotCode != QSIGNAL_CODE)
+  {
+    ERROR_LOG(logger) << "Use the SLOT or SIGNAL macro for slot name!";
+    return ret;
+  }
+
+  slotToExecute++;  // skip code
+  const QMetaObject *mo = objectToInform->metaObject();
+  const QByteArray slot = QMetaObject::normalizedSignature(slotToExecute);
+  const int indexOfSlot = mo->indexOfSlot(slot.data());
+
+  if(indexOfSlot < 0)
+  {
+    WARNING_LOG(logger) << "No such slot " << mo->className() << "::" << slot;
+    return ret;
+  }
+  const QByteArray signal = QMetaObject::normalizedSignature(signalSignature);
+  if(!QMetaObject::checkConnectArgs(signal.data(), slot.data()))
+  {
+    WARNING_LOG(logger) << "Incompatible slot arguments " << mo->className() << "::"
+                        << slot << ", must be: " << signal;
+    return ret;
+  }
+  return mo->method(indexOfSlot);
+}
+} // namespace Helper
+} // namespace DDS
+
+