Add Basic Operators

CMakeLists.txt

src/lns/modification/atomic_recreation.h

src/lns/modification/pair/insert_pair.cpp

src/lns/modification/pair/insert_pair.h

src/lns/modification/route/insert_route.cpp

src/lns/modification/route/insert_route.h

src/lns/operators/generators/enumerate.cpp

src/lns/operators/generators/enumerate.h

src/lns/operators/generators/modification_generator.cpp

src/lns/operators/generators/modification_generator.h

src/lns/operators/reconstruction/list_heuristic_insertion.h

...lns/operators/reconstruction/list_heuristic_insertion.hpp

src/lns/operators/sorting_strategy.cpp

src/lns/operators/sorting_strategy.h

src/lns/solution/solution.cpp

src/lns/solution/solution.h