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/Tools/SqlBrowser/PresetManager.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <QFile>
+#include <QVector>
+
+struct LoginData
+{
+  QString database;
+  QString username;
+  QString password;
+  QString hostname;
+  QString filename;
+  QString driver;
+
+  int port = - 1; // no unsigned short (must contain -1 as default port)
+};
+
+struct Preset
+{
+  QString name;
+  LoginData loginData;
+};
+
+
+class PresetManager : public QObject
+{
+  Q_OBJECT
+public:
+  using PresetList = QVector<Preset>;
+
+  PresetManager();
+  const PresetList &getPresetList() const;
+  void savePreset(const LoginData &loginData, QWidget *parent);
+
+private:
+  QFile file;
+  PresetList presetList;
+
+  void createFile();
+  void savePresets();
+  void addDefaultPreset();
+
+};