Qt6 Migration: LtsWidgets, BUILD_RTI Guards, externe Dependencies dokumentiert

- LtsWidgets Verzeichnis vollständig migriert (Qt5→Qt6)
- BUILD_RTI Guards für RTI-spezifische Module hinzugefügt
- Externe Dependencies in EXTERNAL_DEPS.md dokumentiert
- Qt6 API-Änderungen: QRegExp→QRegularExpression, enterEvent(QEnterEvent*)
- AutoUic-Fehler bei ui_requirement behoben (SKIP_AUTOUIC)
- Include-Pfade korrigiert (LtsElevation, LtsMultiMonitor, LtsUtilsCore)
- MOC-Fehler behoben (Q_INTERFACES entfernt wo nicht benötigt)
- CMakeLists.txt Anpassungen für Qt6 (PUBLIC statt INTERFACE)

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

qt6-after/qt6-migrated-legatus/Lts/Plugins/ProjectDataManagement/Gui/PdmChargeTable/CMakeLists.txt

@@ -5,6 +5,7 @@
 # Created by Mike Wille, SLSE, 2016-05-05
 #
 
+IF(BUILD_RTI)
 SET(charge_table_gui_SRCS
   pdm_charge_table_foreign_gui_interface_impl.cpp
   pdm_charge_table_foreign_gui_interface_impl.h
@@ -26,6 +27,7 @@ NGL_ADD_LIBRARY(WS PdmChargeTableGui STATIC ${charge_table_gui_SRCS})
 NGL_TARGET_INCLUDE_DIRECTORIES(PdmChargeTableGui
   PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/../../..
+    ${CMAKE_SOURCE_DIR}/Lts/Widgets/
 )
 NGL_TARGET_LINK_LIBRARIES(PdmChargeTableGui
   PRIVATE
@@ -61,3 +63,4 @@ NGL_TARGET_LINK_LIBRARIES(PdmChargeTableGuiPlugin
 )
 
 NGL_INSTALL_TARGET(PdmChargeTableGuiPlugin)
+ENDIF()