Improved scheduling tutorial

This MR aims at improving the Scheduling tutorial to demonstrate more advanced concepts:

• Add an example of dataflow C-P model;
• Add getFactorizedScheduling() method, that factorizes repetitive sequences in the static scheduling;
• Add binding for Elts_t struct;
• Fix bug #230 (closed).

include/aidge/scheduler/ProdConso.hpp

@@ -34,6 +34,10 @@ public:
         return std::make_unique<ProdConso>(op, true);
     }
 
+    const Operator& getOperator() const noexcept {
+        return mOp;
+    }
+
     /**
      * @brief Minimum amount of data from a specific input required by the
      * implementation to be run.