refac: rename some files and folders

README.md

default.nix

meson.build

src/main.cpp

src/scheds/HARD_DEFINED_VAR.hpp

src/scheds/bin_packing.cpp

src/scheds/bin_packing.hpp

src/scheds/bin_packing_energy.cpp

src/scheds/bin_packing_energy.hpp

src/scheds/easy_bf.cpp

src/scheds/easy_bf.hpp

src/scheds/fcfs.cpp

src/scheds/fcfs.hpp

src/scheds/multicore_filler.cpp

src/scheds/multicore_filler.hpp

src/users/broker.cpp

src/users/broker.hpp

src/users/dynscheduler.cpp

src/users/dynscheduler.hpp

src/users/user.cpp