refactor code to make it prettier

...imisation/v16/ipch/AutoPCH/3b104b87a075d561/SOLUTION.ipch

...Optimisation/v16/ipch/AutoPCH/3e2062770da5d7b4/ENTRY.ipch

...ion/v16/ipch/AutoPCH/82680a9a4ae4aa01/GESTION_GRAPHE.ipch

...imisation/v16/ipch/AutoPCH/983fcbdeee0f7789/MAINFORM.ipch

Code/JobShop/gestion_graphe.cpp

Code/JobShop/gestion_graphes.h

Code/JobShop/la01.txt

Code/JobShop/la02.txt

Code/JobShop/la03.txt

Code/JobShop/la04.txt

Code/JobShop/la05.txt

Code/JobShop/la06.txt

Code/JobShop/la07.txt

Code/JobShop/la08.txt

Code/JobShop/la09.txt

Code/JobShop/la10.txt

Code/JobShop/la11.txt

Code/JobShop/la12.txt

Code/JobShop/la13.txt

Code/JobShop/la14.txt