Revert "chore : removed ostream operator<< support"

This reverts commit ffc4d22e.

include/aidge/graph/Node.hpp

@@ -457,10 +457,15 @@ private:
    */
   void addParent(const NodePtr otherNode, const IOIndex_t inId);
 
+  /**
+   * @brief operator<< overload to ease print & debug of nodes
+   * @param[inout] ostream to print to 
+   * @param[in] n node to print
+   */
+  friend std::ostream& operator << (std::ostream& os, Node& n); 
 };
 
 } // namespace Aidge
 
 
-
 #endif /* AIDGE_CORE_GRAPH_NODE_H_ */

src/graph/Node.cpp

@@ -390,6 +390,25 @@ std::set<Aidge::NodePtr> Aidge::Node::getNodeDelta(int delta, std::set<Aidge::No
     return out;
 }
 
+namespace Aidge {
+std::ostream& operator << (std::ostream& os, Aidge::Node& n) {
+    using namespace std;
+    os << "Node :\tName :\t\"" << n.name() << "\"\tType : \"" << n.getOperator()->type()<< "\"\tIN/OUTputs : "<< n.nbInputs() <<"/"<< n.nbOutputs() <<endl; 
+    os << "\tParents :\t" ;
+    for (const auto & p : n.getParents())
+    {
+        os << "\"" <<p->name() << "\"\t"; 
+    }
+    os << endl;
+    os << "\tChildren :\t" ;
+    for (const auto & c : n.getChildren())
+    {
+        os << "\"" << c->name() << "\"\t"; 
+    }
+    os << endl;
+    return os;
+}
+}
 /////////////////////////////////////////////////////////////////////////////////////////////
 // private