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/Proxies/Buildings/BuildingControlUnit/main_handler.h

@@ -0,0 +1,66 @@
+/**
+  * @RDE_HEADER@
+  * main for BuildingControlUnit
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2017-01-27
+  */
+
+#pragma once
+
+#include <QObject>
+#include <BSM/bsm_api.h>
+#include <Json/json_api.h>
+#include <VWM/vwm_api.h>
+//#include <EGCU/egcu_api.h>
+#include <ControlEffects/handeleffects.h>
+#include "handle_http_request.h"
+#include "logger.h"
+
+class QWebSocket;
+namespace BuildingControlUnit
+{
+class MainHandler : public QObject
+{
+  Q_OBJECT
+public:
+  MainHandler();
+  ~MainHandler();
+
+  bool init(const QString &ammuXml,
+            const QString &bldCfgXml,
+            const QString &vwmXml,
+            unsigned short listenPort,
+            const bool initBuilding,
+            const QString &controlEffectsCfg);
+
+private Q_SLOTS:
+  void onHitResult(const HitResult &result, const QMap<int, ContaminationState> &contaminationStates, bool playSound);
+  void setInitialOverrides(const QString &hostname);
+  void onUnknownDirectHit(int sensorId);
+  void onSetEffectStatesRequest(const QString &hostname, const QVector<BcuEffectState> &effectStates);
+  void onSwitchRelayRequest(const QString &hostname, const SwitchRelayValues &switchRelayValues);
+  void webSocketSendInitialData(QWebSocket *ws);
+private:
+  QVector<int> getAffectedRoomIds(const QVector<HitRoom> &allHitRooms) const;
+  QVector<int> getSegmentDamage(const QVector<HitRoom> &allHitRooms, const int damagePercentNew) const;
+  int getHitRoomId(const QVector<HitRoom> &allHitRooms) const;
+  void flashBuildingDestructionIndicator(int egcu);
+  void cleanup();
+private:
+  BSM::Api *m_bsmApi;
+  //EGCU::Api *m_egcuApi;
+  Json::Api *m_jsonApi;
+  VWM::Api *m_vwmApi;
+  HandelEffects * m_handelEffectsBsm;
+  HandleHttpRequest * m_handleHttpRequest;
+  BuildingEgcuConfig m_egcuConfig;
+  QVector<HandelEffects*> m_handelEffectsVec;
+  QMap< QString, QVector<BcuEffectState>> m_effectStates;
+  BcuEffectOverride m_bsmFlash;
+
+  NGL::INGLLogger &m_logger;
+};
+
+} // BuildingControlUnit