refactor

include/field.h

include/group.h

include/helper.h

include/hnsw.h

include/ipre.h

include/matrix.h

include/vector.h

src/field.cpp

src/group.cpp

src/helper.cpp

src/hnsw.cpp

src/ipre.cpp

src/matrix.cpp

src/vector.cpp

tests/test_field.cpp

tests/test_group.cpp

tests/test_helper.cpp

tests/test_ipre.cpp