This function sets the verbosity level for the SciGeneX package,
which controls the amount of information that is printed to the console by
the print_msg function. The verbosity level can be set to
any non-negative integer, with higher values indicating more detailed output.
By default, the verbosity level is set to 1.
set_verbosity(verbosity_value)A non-negative integer indicating the verbosity level to be set.
# Set verbosity level to 2
set_verbosity(2)
# Set verbosity level to 0
set_verbosity(0)