setup-replicated-cli GitHub Action

[znd4]

Not sure if this should go here or replicatedhq/replicated-actions, but it'd be nice to have a setup-replicated-cli GitHub Action. I don't have strong opinions about the features, but it'd be nice if it supported version and fingerprint arguments.

lmk if you're up for a PR, b.c. I'm already implementing the simple script for this on a private action, and wouldn't mind the logic having community eyes on it