lorri init .envrc: fall back to `use nix`

[Profpatsch]

A trivial improvement, the default .envrc should check whether lorri is installed and if not fall back to the direnv-native use nix.

[SuperSandro2000]

Like this?

if has lorri; then
  eval "$(lorri direnv)"
else
  use nix
fi

[Profpatsch]

yeah, with type lorri >/dev/null I guess

[SuperSandro2000]

yeah, with type lorri >/dev/null I guess

That would need to be type -P lorri &>/dev/null.

[chisui]

Maybe also include a link to lorri in the fallback case?