rename command.h to z3ed.h, update structure

src/cli/z3ed.cmake

@@ -22,6 +22,7 @@ add_executable(
   app/core/common.cc
   app/core/project.cc
   app/core/platform/file_path.mm
+  app/core/utils/file_util.cc
   ${YAZE_APP_EMU_SRC}
   ${YAZE_APP_GFX_SRC}
   ${YAZE_APP_ZELDA3_SRC}