refactor: unify Object signal system, update property connections, and integrate Eigen3 into Root module

src/Root/CMakeLists.txt

@@ -33,7 +33,11 @@ set(DICTIONARY_HEADERS muCastorMCTrack.h
                        SkinDetectorWriter.h)
 
 set(LIBRARIES ${ROOT_LIBRARIES}
-              ${PACKAGE_LIBPREFIX}Math)
+              ${PACKAGE_LIBPREFIX}Math
+              Eigen3::Eigen)
+
+get_target_property(EIGEN3_INC Eigen3::Eigen INTERFACE_INCLUDE_DIRECTORIES)
+include_directories(${EIGEN3_INC})
 
 set(rDictName ${PACKAGE_LIBPREFIX}RootDict)
 root_generate_dictionary(${rDictName} ${DICTIONARY_HEADERS}