Merge branch 'lohenry-addStationIdx' into 'master'

Add the stationIdx method

See merge request !3759

Det/FTDet/include/FTDet/DeFTStation.h

@@ -49,6 +49,9 @@ public:
   /** @return stationID */
   [[nodiscard]] unsigned int stationID() const { return m_stationID; }
 
+  /** @return stationID */
+  [[nodiscard]] unsigned int stationIdx() const { return m_stationID - 1; }
+
   /** @return Vector of pointers to the FT Layers */
   [[nodiscard]] const auto& layers() const { return m_layers; }