Qt6 migration: LtsWidgets API fixes, LtsWebSocket logger init, RTI Docker install

- LtsWidgets: Fixed Qt6 API compatibility issues
  - QWheelEvent::delta() → angleDelta().y()
  - QStyleOption::init() → initFrom()
  - QComboBox activated signal signature change
  - QTextCodec removal (UTF-8 default in Qt6)
  - Missing widget includes added

- LtsWebSocket: Fixed m_logger reference initialization
  - Added NGLLoggerBootstrap includes
  - Proper initialization in constructor initializer lists

- CMake: Added BUILD_LTSWEBSOCKET option for temporary exclusion

- Docker: RTI Connext permanent installation script added
  - ci/install-rti-in-docker.sh for persistent RTI setup
  - Removes need for volume mounting RTI into container

- BUILD options: FilterManagement, RTI, Codification, Grantlee, LtsWebSocket
  can be disabled for partial builds during migration

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

qt6-after/qt6-migrated-legatus/Lts/Plugins/InfrastructureManagement/CMakeLists.txt

@@ -37,11 +37,18 @@ ADD_INTERFACE_LIBRARY(
 #
 # need top be shared due to signals/slots
 NGL_ADD_LIBRARY2(WS IsmDataPluginInterface SHARED ism_data_plugin_interface.h)
+IF(BUILD_RTI)
 NGL_TARGET_LINK_LIBRARIES(IsmDataPluginInterface
   Qt6::Core
   svcIsmCommon
   DataPluginInterface
 )
+ELSE()
+NGL_TARGET_LINK_LIBRARIES(IsmDataPluginInterface
+  Qt6::Core
+  DataPluginInterface
+)
+ENDIF(BUILD_RTI)
 NGL_INSTALL_TARGET(IsmDataPluginInterface)
 
 #