Add a new functor that stores the MC_ORIGINFLAG (i.e. a flavour tag type)

Add MC_ORIGINFLAG using MCTaggingHelperTool

Should go together with DaVinci!1000 (merged) and Analysis!1043 (merged)

Phys/DaVinciMCKernel/include/Kernel/MCTaggingHelper.h

+/*****************************************************************************\
+* (c) Copyright 2024 CERN for the benefit of the LHCb Collaboration           *
+*                                                                             *
+* This software is distributed under the terms of the GNU General Public      *
+* Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   *
+*                                                                             *
+* In applying this licence, CERN does not waive the privileges and immunities *
+* granted to it by virtue of its status as an Intergovernmental Organization  *
+* or submit itself to any jurisdiction.                                       *
+\*****************************************************************************/
+#pragma once
+#include "Event/MCParticle.h"
+#include <iostream>
+
+namespace LHCb::FlavourTagging {
+
+  enum struct originTagCodes {
+    SignalB_Decay          = 0,
+    SS_Fragmentation       = 1,
+    OS_B_Decay             = 2,
+    OS_ExcitedB_Decay      = 3,
+    OS_b_Fragmentation     = 4,
+    Prompt_From_SignalB_PV = 5,
+    Other_From_SignalB_PV  = 6,
+    Not_From_SignalB_PV    = 100
+  };
+  std::ostream& operator<<( std::ostream&, originTagCodes );
+
+  originTagCodes originType( const LHCb::MCParticle& bMC, const LHCb::MCParticle& bAnMC, const LHCb::MCParticle& tMC );
+  originTagCodes originType( const LHCb::MCParticle& bMC, const LHCb::MCParticle& tMC );
+
+}; // namespace LHCb::FlavourTagging