Add configuration method to disable certain kinds of actionability checks

Allow users to, for example, disable visibility checks.

Some kind of configuration method that would live in the test setup file that would look like this:

```js
import { configure } from 'pleasantest'

configure({
disabledActionabilityChecks: ['visibility'],
})
```

Start by locating the actionability checks and the test setup configuration entry point in pleasantest. Trace how visibility checks are selected or run, then determine how the proposed configure({ disabledActionabilityChecks: ['visibility'] }) option should affect them. Done means users can disable selected checks from their setup file without affecting other checks.

Written by the indexing model from the issue text.