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/Services/AreaEffectSimulation/handler_technical_area.h

@@ -0,0 +1,43 @@
+/**
+  * Handler for all Language HMI objects
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Hanna E. Rathje, SLSE, 2015-09-03
+  */
+#pragma once
+
+#include <QMap>
+
+#include "aes_db.h"
+#include "handler_base.h"
+#include "object_technical_area.h"
+
+
+
+namespace AreaEffectSimulation
+{
+
+class HandlerTechnicalArea final : public HandlerBaseTmpl<ObjectTechnicalArea>
+  , protected Interface::Fts::TechnicalAreaModifyRequestHandler
+  , protected Interface::Fts::TechnicalAreaRemoveRequestHandler
+{
+  Q_OBJECT
+public:
+  explicit HandlerTechnicalArea(MainHandler *mainHandler);
+  ~HandlerTechnicalArea() = default;
+
+  bool init();
+
+private:
+  void onTechnicalAreaModifyRequest(const rti::core::SampleIdentity &cookie,
+                                    const TechnicalAreaModifyRequest &request) override;
+  Core::FunctionReplyObject technicalAreaCreateRequest(const TechnicalAreaModifyRequest &request);
+  Core::FunctionReplyObject technicalAreaModifyRequest(const TechnicalAreaModifyRequest &request);
+  void onTechnicalAreaRemoveRequest(const rti::core::SampleIdentity &cookie,
+                                    const Core::RemoveElementRequest &request) override;
+
+  int totalAreas() const override;
+  int totalAreasCentral() const override;
+};
+}