Support unjammed arguments

[janmasrovira]

  --arg ARG_TYPE:ARG       An argument to the program:
                           • nat:NATURAL where NATURAL is passed verbatim as a nockma atom
                           • base64:FILE where FILE is a file containing a base64 encoded nockma atom that represents a jammed noun
                           • bytes:FILE where FILE is a file containing bytes of a nockma atom that represents a jammed noun

*-- the options below are NEW --*

                           • bytes-unjammed:FILE where FILE is a file containing bytes of a nockma atom that represents an unjammed atom
                           • base64-unjammed:FILE where FILE is a file containing a base64 encoded nockma atom that represents an unjammed atom