BUILD_RTI conditional fixes and Qt6 API updates

- cmake/FindRTI.cmake: Add INTERFACE placeholder targets when RTI not found
- cmake/FindRTI.cmake: Force BUILD_RTI=OFF when RTI not installed
- Lts/Common/LtsSession/CMakeLists.txt: Make LtsSessionDataDds conditional on BUILD_RTI
- Lts/Viewer/CMakeLists.txt: Make LtsDataView conditional on BUILD_RTI
- Lts/Plugins/*/CMakeLists.txt: 97 plugin files wrapped in BUILD_RTI conditionals
- cmake/NGLMacros.cmake: Fix NGL_ADD_BIG_RESOURCES macro (removed premature return())
- Multiple Qt6 API fixes: QLinkedList→std::list, QStringRef→QStringView, etc.
- BUILD_RTI_FIXES_SUMMARY.md: Comprehensive documentation of all fixes

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/Common/situation_map_logging.cpp

@@ -0,0 +1,51 @@
+/**
+  * @RDE_HEADER@
+  * Logging within SituationMap
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#include "situation_map_logging.h"
+#include <NGLLogger/NGLLoggerBootstrap.h>
+#include <QUuid>
+namespace SituationMap
+{
+
+LOGGER_T getLogger(const char *name, int id)
+{
+  static const QLatin1String prefix("SituationMap.");
+  std::string loggerName;
+  const size_t len = strlen(name);
+  loggerName.reserve(prefix.size() + len);
+  loggerName.append(prefix.data(), prefix.size());
+  loggerName.append(name, len);
+
+  if (id > 0)
+  {
+    std::stringstream loggerStream;
+    loggerStream << loggerName << "." << id;
+    loggerName = loggerStream.str();
+  }
+
+  try
+  {
+    return NGL::NGLLoggerBootstrap::getNGLRootLogger().
+           getNGLLogger(loggerName);
+  }
+  catch (const std::exception &ex)
+  {
+    fprintf(stderr, "Error retrieving logger: %s", ex.what());
+    abort();
+  }
+}
+
+} // namespace SituationMap
+
+std::ostream &operator<< (std::ostream &stream,
+                          const QUuid &value)
+{
+  stream << "QUuid(" << value.toString() << ")";
+  return stream;
+}
+