feature request: add --help option

[aanderse]

🙇‍♂️

[nikstur]

This would almost certainly involve pulling in a CLI crate (i.e. most likely clap) and thus siginifanctly increase the binary size. It's a tradeoff for which I haven't made up my mind yet. Can you expand why you would like an --help option?

Same story for #9

[aanderse]

if argv[1] == "--help" then
  print("userborn v $version")
  print("usage: userborn <configfile> <directory to write to>"

just that would be a huge improvement
i had to dig into the source code because i had no idea how to operate the program