switch to cli errors/messaging

[m-muecke]

Since most tidyverse packages switched to using the cli package for errors, i.e. cli::cli_abort()/cli::cli_inform()/cli::cli_warn(), would you be open to adopting the same pattern for the tidyverts packages? If so, I would be happy to provide a PR.

[mitchelloharawild]

Yes, I have been wanting to do this. If you'd like to make a PR for this, I'd gladly accept it.