smthrs completions — Generate shell completion script

Usage: smthrs completions <bash|fish|nushell|zsh>

Arguments:
  shell  Shell to generate completions for

Setup:
  bash     eval "$(smthrs completions bash)"  # add to ~/.bashrc
  fish     smthrs completions fish | source   # add to ~/.config/fish/config.fish
  nushell  see `smthrs completions nushell`   # add to config.nu
  zsh      eval "$(smthrs completions zsh)"   # add to ~/.zshrc
