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/TextEditorTest/textedit.h

@@ -0,0 +1,105 @@
+#ifndef TEXTEDIT_H
+#define TEXTEDIT_H
+
+#include <QMainWindow>
+#include <QMap>
+#include <QPointer>
+#include <QHBoxLayout>
+#include <QGridLayout>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QComboBox;
+class QFontComboBox;
+class QTextEdit;
+class QTextCharFormat;
+class QMenu;
+class QPrinter;
+QT_END_NAMESPACE
+
+class TextEdit : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    TextEdit(QWidget *parent = 0);
+
+    bool load(const QString &f);
+
+public slots:
+    void fileNew();
+
+protected:
+    void closeEvent(QCloseEvent *e) override;
+
+private slots:
+    void fileOpen();
+    bool fileSave();
+    bool fileSaveAs();
+    void filePrint();
+    void filePrintPreview();
+    void filePrintPdf();
+
+    void textBold();
+    void textUnderline();
+    void textItalic();
+    void textFamily(const QString &f);
+    void textSize(const QString &p);
+    void textStyle(int styleIndex);
+    void textColor();
+    void textAlign(QAction *a);
+    void setChecked(bool checked);
+    void indent();
+    void unindent();
+
+    void currentCharFormatChanged(const QTextCharFormat &format);
+    void cursorPositionChanged();
+
+    void clipboardDataChanged();
+    void about();
+    void printPreview(QPrinter *);
+
+private:
+    void setupFileActions();
+    void setupEditActions();
+    void setupTextActions();
+    bool maybeSave();
+    void setCurrentFileName(const QString &fileName);
+    void modifyIndentation(int amount);
+
+    void mergeFormatOnWordOrSelection(const QTextCharFormat &format);
+    void fontChanged(const QFont &f);
+    void colorChanged(const QColor &c);
+    void alignmentChanged(Qt::Alignment a);
+
+    QAction *actionSave;
+    QAction *actionTextBold;
+    QAction *actionTextUnderline;
+    QAction *actionTextItalic;
+    QAction *actionTextColor;
+    QAction *actionAlignLeft;
+    QAction *actionAlignCenter;
+    QAction *actionAlignRight;
+    QAction *actionAlignJustify;
+    QAction *actionIndentLess;
+    QAction *actionIndentMore;
+    QAction *actionToggleCheckState;
+    QAction *actionUndo;
+    QAction *actionRedo;
+#ifndef QT_NO_CLIPBOARD
+    QAction *actionCut;
+    QAction *actionCopy;
+    QAction *actionPaste;
+#endif
+
+    QComboBox *comboStyle;
+    QFontComboBox *comboFont;
+    QComboBox *comboSize;
+
+    QToolBar *tb;
+    QString fileName;
+    QTextEdit *textEdit;
+};
+
+#endif // TEXTEDIT_H
+