[hlx init] unfriendly error message

[trieloff]

$ hlx init
Not enough non-option arguments: got 0, need at least 1

correct, but not helpful. Just show

hlx init <name> [dir]

Initialize the project structure

Positionals:
  name  Name of the project to initialize                    [string] [required]
  dir   Parent directory of new project                  [string] [default: "."]

Options:
  --version  Show version number                                       [boolean]
  --help     Show help                                                 [boolean]

[tripodsan]

hmm, I thought I changed this once....