Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/Lts/Plugins/AdvancedSymbology/Gui/SymbolEditor/CMakeLists.txt

@@ -37,6 +37,8 @@ QT5_ADD_RESOURCES(symboleditor_SRCS application.qrc)
 NGL_WRAP_UI(symboleditor_SRCS ${symboleditor_UICS})
 
 NGL_ADD_LIBRARY(WS AsbSymEditGuiPlugin MODULE ${symboleditor_SRCS} ${symboleditor_UICS})
+set_target_properties(AsbSymEditGuiPlugin PROPERTIES AUTOUIC ON)
+set_target_properties(AsbSymEditGuiPlugin PROPERTIES AUTOUIC_SEARCH_PATHS "${CMAKE_CURRENT_SOURCE_DIR}/forms")
 NGL_TARGET_LINK_LIBRARIES(AsbSymEditGuiPlugin
   NGLLogger
   LtsWidgets