Session 022: Migrate Lts/Tools (72 submodules) to Qt6

- Copied complete Lts/Tools directory from qt5-before to qt6-after
- Updated 32 CMakeLists.txt files (Qt5:: → Qt6::)
- Tools subdirectory already included in parent Lts/CMakeLists.txt
- All 72 tool submodules now present in qt6-migrated-legatus
- Includes: Adler, ArAssets, ConfigX, DBAdministration, DBUpdate,
  DdsView, InfrastructureManagement, and 67 more tools
- C++17 standard (RTI 7.7.0 compatibility maintained)
- Tests deferred until final validation phase

Migration progress:
✅ Lts/Application (68 files)
✅ Lts/DDS (verified Qt6-ready)
✅ Lts/Plugins (60 submodules, verified)
✅ Lts/Projects (5 submodules, verified)
✅ Lts/Proxies (13 submodules, verified)
✅ Lts/Services (47 submodules, verified)
✅ Lts/Tools (72 submodules, copied + CMake updated)
✅ Lts/Viewer (LtsFileDialog, LtsReportDisplay, SituationMap)
🟡 TetraIF (partial)
🟡 Z (partial: nglwidgets, QtSingleApplication, qsql_informix, WMS_Interface)

qt6-after/qt6-migrated-legatus/Lts/Tools/SqlBrowser/AddModel.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <QAbstractTableModel>
+#include "DataModel.h"
+
+class AddModel : public QAbstractTableModel
+{
+  Q_OBJECT
+  
+public:
+  using QAbstractTableModel::QAbstractTableModel;
+  
+  void setHeaderList(const HeaderList& headerList);
+  void setTablename(const QString& tableName);
+  const QString& getTableName() const;
+  QVariant::Type getColumnType(const int column) const;
+  const HeaderList& getHeaderList() const;
+  
+  int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+  int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+  QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+  bool setData(const QModelIndex &index, const QVariant &value, int role) override;
+  QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+  Qt::ItemFlags flags(const QModelIndex &index) const override;
+  bool removeRow(int row, const QModelIndex &parent = QModelIndex());
+  void clear();
+  
+private:
+  HeaderList m_headerList;
+  DataList m_dataList;
+  QString m_tableName;
+  
+};