[tree] Restructured tree

CMakeLists.txt

include/sot/talos_balance/example.hh

include/sot/talos_balance/utils/commands-helper.hh

include/sot/talos_balance/utils/logger.hh

include/sot/talos_balance/utils/signal-helper.hh

src/example.cpp

src/utils/logger.cpp

src/utils/stop-watch.cpp