Add selector in maint_interface

CMakeLists.txt

src/input/pdptw_data.cpp

src/input/pdptw_data.h

src/lns/lns.cpp

src/lns/lns.h

src/lns/operators/abstract_operator.h

...operators/reconstruction/list_heuristic_cost_oriented.cpp

...s/operators/reconstruction/list_heuristic_cost_oriented.h

...lns/operators/reconstruction/list_heuristic_insertion.cpp

src/lns/operators/reconstruction/list_heuristic_insertion.h

src/mains/main.cpp

src/mains/main_interface.cpp

src/mains/main_interface.h

src/output/lns_output.cpp

src/output/lns_output.h

src/output/solution_checker.cpp