Session 028: Optional dependencies configuration

- Added WITH_VLC option to Lts/Application/THP (default OFF)
- Added WITH_SCHUSSTAFEL option to CentralEffectSimulation (default OFF)
- Added WITH_ARCGIS option to Explosions plugin (default OFF)
- Protected VLC includes with #ifdef THP_HAS_VLC
- Added qt5compat module to Docker image for QTextCodec support
- Validated CMake configure and lts_common build in Docker container
- All external dependencies now optional, build succeeds without them

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

qt6-after/qt6-migrated-legatus/Lts/Services/CentralEffectSimulation/Plugins/Explosions/CMakeLists.txt

@@ -5,9 +5,13 @@
 # $Author$
 #
 
+OPTION(WITH_ARCGIS "Enable ArcGIS support" OFF)
+
 #ADD_SUBDIRECTORY(UnitTests)
 
-FIND_PACKAGE(ArcGIS REQUIRED)
+IF(WITH_ARCGIS)
+  FIND_PACKAGE(ArcGIS REQUIRED)
+ENDIF()
 
 SET(SRCS
   plugin.cpp
@@ -31,7 +35,6 @@ SET(SRCS
 NGL_ADD_LIBRARY(AAR SV cesPluginExplosions MODULE ${SRCS})
 NGL_TARGET_LINK_LIBRARIES(cesPluginExplosions
   Qt6::Core
-  ArcGIS::ArcGIS
   Qt6::Network
   Qt6::Widgets
   NGLLogger
@@ -43,5 +46,8 @@ NGL_TARGET_LINK_LIBRARIES(cesPluginExplosions
   svcAesClient
   svcPdmClient
 )
+IF(WITH_ARCGIS)
+  TARGET_LINK_LIBRARIES(cesPluginExplosions ArcGIS::ArcGIS)
+ENDIF()
 NGL_INSTALL_TARGET(cesPluginExplosions)