Add utility headers and bash scripts

code/bash/aliases.sh

code/bash/pathutils.sh

code/include/CountingIterator.hh

code/include/FileAsLines.hh

code/include/Vbose.hh

code/include/binform17.hh

code/include/cxx20format

code/include/cxx20ranges

code/include/print_tuple.hh

code/include/range_output.hh

code/include/timeit.hh