Quantization ptq

Adding implementation of Scaling operator.

src/operator/ScalingImpl.cpp

@@ -10,9 +10,8 @@
  ********************************************************************************/
 
 #include <cassert>
-#include <chrono>  // std::chrono::milliseconds
-#include <numeric> // std::accumulate
-#include <thread>  // std::this_thread::sleep_for
+#include <numeric>    // std::accumulate
+#include <functional> // std::multiplies
 
 #include "aidge/operator/Scaling.hpp"