.aliases updated: rewrote cd aliases accordingly to the incoming .acos harmonization update (shells builtin utilities commands aliases), and wrote `py3` Python 3 alias ('internal' programs commands aliases).
.aliases updated: rewrote cd aliases accordingly to the incoming .acos harmonization update (shells builtin utilities commands aliases), and wrote `py3` Python 3 alias ('internal' programs commands aliases).

kvpb/.files,kvpb/.files,kvpb/.files