EXAMPLES:

  # bash (user)
  iwe completions bash > ~/.local/share/bash-completion/completions/iwe

  # zsh (place on $fpath, e.g. ~/.zsh/completions)
  iwe completions zsh > ~/.zsh/completions/_iwe

  # fish
  iwe completions fish > ~/.config/fish/completions/iwe.fish

  # nushell (source the file from your config.nu)
  iwe completions nushell > ~/.config/nushell/completions/iwe.nu

  # one-off, current shell only
  source <(iwe completions bash)
