Draft: Muon learning

@jojungge, @atlasbot, @minions

MuonSpectrometer/MuonPhaseII/MuonLearning/MuonBucketGraph/FCGraphMaker.cpp

+#include "FCGraphMaker.h"
+
+FCGraphMaker::FCGraphMaker(const SpacePointBucket* bucket, const GraphFramer& graphType, const IMuonIdHelperSvc* idHelperSvc)
+    : m_bucket(bucket), m_graphType(graphType), m_idHelperSvc(idHelperSvc) {}
+
+void FCGraphMaker::extractGraphData(std::vector<float>& features, std::vector<int64_t>& edge_src, std::vector<int64_t>& edge_dst) {
+	// implementation
+
+}
+