Refactor directory structure and module names

p2p-rm/test/mapped_ptr_unit.cpp

p2p-rm/test/p2p_integration.cpp

p2p-rm/test/peer_cli.cpp

p2p-rm/test/tests.cpp

reconstruct/CMakeLists.txt

reconstruct/src/main.cpp

vision/CMakeLists.txt

vision/README.md

vision/include/elas.h

vision/include/ftl/algorithms/elas.hpp

vision/include/ftl/algorithms/fixstars_sgm.hpp

vision/include/ftl/algorithms/nick.hpp

vision/include/ftl/algorithms/np_attention.hpp

vision/include/ftl/algorithms/opencv_bm.hpp

vision/include/ftl/algorithms/opencv_cuda_bm.hpp

vision/include/ftl/algorithms/opencv_cuda_bp.hpp

vision/include/ftl/algorithms/opencv_cuda_csbp.hpp

vision/include/ftl/algorithms/opencv_sgbm.hpp

vision/include/ftl/algorithms/rtcensus.hpp

vision/include/ftl/algorithms/rtcensus_sgm.hpp