feat: add a "download" or "results" sub command for retrieving check results

[MegaMaddin]

What problem does this feature solve?

As a customer/user of the CLI, I want to be able to download check results as well, w/o the need of tinkering together API requests. In a perfect world I'd be able to provide some filters (like tags, check type, success state, check id) for retrieving results.

How would you implement this feature?

I'd use the public API for data gathering and filtering where possible, otherwise use client side filtering.