fix folder structure, improve CMakeLists.txt

.gitignore

CMakeLists.txt

b_asic_debug_log.txt

legacy/README.md

legacy/simulation_oop/core_operations.h

legacy/simulation_oop/custom_operation.cpp

legacy/simulation_oop/custom_operation.h

legacy/simulation_oop/operation.cpp

legacy/simulation_oop/operation.h

legacy/simulation_oop/signal_flow_graph.cpp

legacy/simulation_oop/signal_flow_graph.h

legacy/simulation_oop/simulation.cpp

legacy/simulation_oop/simulation.h

legacy/simulation_oop/special_operations.cpp

legacy/simulation_oop/special_operations.h

setup.py

src/debug.h

src/simulation.cpp

src/simulation/compile.cpp

src/simulation/compile.h