moved shooting controlls to separate lib and added tests for them

src/game/CMakeLists.txt

src/game/game.cpp

src/game/game.h

src/game/shoot_controller/CMakeLists.txt

src/game/shoot_controller/multi_shot.cpp

src/game/shoot_controller/multi_shot.h

src/game/shoot_controller/shoot_controller.cpp

src/game/shoot_controller/shoot_controller.h

src/game/shoot_controller/single_shot.cpp

src/game/shoot_controller/single_shot.h

test/tests.cpp