Add knowledge distillation (KD) loss to aidge_learning

Context

Adding the Knowledge Distillation (KD) loss to aidge for incremental learning.

Modified files

• aidge_learning/src/loss/distillation/KD.cpp: definition of the KD loss (highly inspired by BCE loss)
• aidge_learning/include/aidge/loss/LossList.hpp: Adding the KD loss the loss list
• aidge_learning/python_binding/learning/loss/pybind_Loss.cpp: Add the biding python for the KD Loss

TODO

Integrate the merge request into the main branch

• NOT DONE
• DONE
• TO DO