Move/re-implement 'version check' config stuff under 'liq project config'

## Overview

The old UI supported ignoring and unignoring packages in the version check, as well as showing the config. (I forget why this was important.) These are great features, but should be handled under `liq projects config version-check` (or ???) rather than `liq projects qa`. The code is in the QA lib, but is currently inaccessible since the options to activate it are not passed through.

Start by inspecting the QA library and the existing `liq projects qa` command, then trace how version-check options are passed through. Determine the intended `liq projects config version-check` command structure. Done means the version-check config can be shown and packages can be ignored or unignored through the config command rather than QA.

Written by the indexing model from the issue text.