[BUG] - All cli commands require `--source` to be set

[Jonas Grawe]

All cli commands require the --source argument to be set.
This was not noticed until recently, as the argument will default to the env variable PUNKTF_SOURCE if not explicitly set.

  ==> Generating man page
  error: The following required arguments were not provided:
    --source <SOURCE>
  
  Usage: punktf --source <SOURCE> <COMMAND>

[Michael Lohr]

lol