component → screen 关系

文件在 src/ftxui/component	在 src/ftxui/screen 中引用
screen_interactive.cpp	util.hpp
src/ftxui/component/dropdown.cpp	util.hpp
src/ftxui/component/input.cpp	string_internal.hpp
src/ftxui/component/input.cpp	util.hpp
src/ftxui/component/menu.cpp	util.hpp
src/ftxui/component/radiobox.cpp	util.hpp