Moved the AI part to AI folder and the GUI part to GUI folder

.gitignore

AI/src/game/connect4.cpp

AI/src/game/connect4.hpp

AI/src/game/game.hpp

AI/src/game/lines_of_action.cpp

AI/src/game/lines_of_action.hpp

AI/src/game/morpion.cpp

AI/src/game/morpion.hpp

AI/src/game/penguin.cpp

AI/src/game/penguin.hpp

AI/src/game/test_connect4.cpp

AI/src/game/test_connect4.hpp

AI/src/game/test_lines_of_action.cpp

AI/src/game/test_lines_of_action.hpp

AI/src/game/test_two_players_game.cpp

AI/src/game/test_two_players_game.hpp

AI/src/json/json.hpp

AI/src/main/main.cpp

AI/src/mcts/allocator.cpp

AI/src/mcts/allocator.hpp