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/Splash/Splash.cpp

@@ -0,0 +1,35 @@
+/**
+  * @RDE_HEADER@
+  * Splash Manager
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  *
+  * Created by Mike Wille, NLE, 2019-06-21
+  */
+
+#include "Splash.h"
+
+#include <LtsWidgets/lts_splash.h>
+
+#include <QApplication>
+
+
+Splash::Splash(const QString &lang)
+  : QObject(nullptr)
+{
+  LtsWidgets::Splash::getInstance()->show();
+
+  QString message(QStringLiteral("Starting local server ..."));
+
+  if (lang == QStringLiteral("de_DE"))
+    message = QStringLiteral("Lokaler Server wird gestartet ...");
+
+  LtsWidgets::Splash::getInstance()->setMessage(message);
+}
+
+
+Splash::~Splash()
+{
+  LtsWidgets::Splash::getInstance()->done();
+}