Automatically Remind People to Review/Close and issue after set time?

We have quite a few issues open. (_I'm partly to blame as I use them to capture/share thoughts..._)

Where issues have a `help wanted` label applied to them, we should show them on: https://github.com/dwyl/tudo/issues/146 so that a _human_ can investigate.

Issues with only the original comment:
+ "Is this still an issue or can it be closed? please add detail or close if no longer required"
(_we can iterate on the copy..._)

Issues with multiple comments (_i.e. some discussion/progress_)
+ "Is this still an issue?"

After @dwylbot has commented, we should wait for a set amount of days for the person to reply and
`.then` _automatically **close** the issue_ with the following comment:
+ "_this issue has been closed due to in-activity. if there is still an ongoing question/problem about/with code that has not yet been resolved, please feel free to re-open and add a comment with more detail so we can help triage it. Thanks!_"