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>

qt6-after/qt6-migrated-legatus/Lts/Application/THP/thpwidgets/thp_building_widget.cpp

@@ -0,0 +1,80 @@
+/**
+  * @RDE_HEADER@
+  * Handle bulding display in thp
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#include "thp_building_widget.h"
+#include "ui_thp_situation_building_base.h"
+#include "thp_building_settings.h"
+#include "thp_plugin_provider.h"
+
+#include <QMenu>
+
+#include <BuildingViewer/Common/bdv_controller.h>
+#include <BuildingViewer/Common/bdv_plugin_provider.h>
+#include <LtsScriptTimeline/track_entry.h>
+#include <LtsWidgets/lts_dialog_helper.h>
+
+#include <SituationReplay/handler_situation_replay_sqlite.h>
+
+namespace THP
+{
+using namespace SituationReplay;
+
+BuildingWidget::BuildingWidget(QWidget *parent)
+  : SituationBuildingBase("THP.BuildingWidget", parent)
+{
+  QMenu *m = new QMenu(m_ui->btnFilter);
+  m->addAction(tr("Global Settings"), this, &BuildingWidget::onGlobalSettings);
+  m_ui->btnFilter->setMenu(m);
+}
+
+BuildingWidget::~BuildingWidget()
+{
+  delete m_bgvController;
+}
+
+bool BuildingWidget::init(SituationReplay::MainHandlerSqlite *mhs, BuildingPluginProvider *pp, const QString &homePath)
+{
+  if (!SituationBuildingBase::init(mhs))
+    return false;
+  m_replayHandler = mhs;
+  m_pluginProvider = pp;
+
+  // parse json, create xml, init buildingviewer
+  delete m_bgvController;
+  m_bgvController = new BuildingViewer::BgViewerController(this);
+  if (!m_bgvController->init(m_pluginProvider, true, homePath + QStringLiteral("/BuildingModels/")))
+    return false;
+
+  auto w = m_bgvController->getBgViewerWidget();
+  w->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+  m_ui->vLayout->insertWidget(0, w);
+  return true;
+}
+
+bool BuildingWidget::showSituationInternal()
+{
+  m_bgvController->excRestoreViewState(m_attributes[QStringLiteral("arrBuildingStates")]);
+  if (!SituationBuildingBase::showSituationInternal())
+    return false;
+  onInitDone();
+  return true;
+}
+
+void BuildingWidget::emitPartitionTimeChanged(qint64 curTime)
+{
+  m_pluginProvider->emitPartitionTimeChanged(curTime);
+}
+
+void BuildingWidget::onGlobalSettings()
+{
+  if (!m_globalSettingsDialog)
+    m_globalSettingsDialog = new BgViewerSettingsView(m_bgvController, this);
+  m_globalSettingsDialog->show();
+}
+
+}