[PWGEM] Add checkMCPairTemplate.cxx as task to study shape of different b->Hc->e decays (AliceO2Group#14779)

Author: feisenhu

PWGEM/Dilepton/Tasks/CMakeLists.txt

@@ -155,3 +155,7 @@ o2physics_add_dpl_workflow(check-mc-template
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore O2::GlobalTracking
                     COMPONENT_NAME Analysis)
 
+o2physics_add_dpl_workflow(check-mc-pair-template
+                    SOURCES checkMCPairTemplate.cxx
+                    PUBLIC_LINK_LIBRARIES O2::Framework O2::DetectorsBase O2Physics::AnalysisCore O2Physics::MLCore O2Physics::PWGEMDileptonCore
+                    COMPONENT_NAME Analysis)