bot for answered issues

[svlandeg]

Description

Adding bot by @tiangolo to follow up on issues that got the label answered

• Currently runs at midnight
• Removes the label when someone (anyone) replies
• Automatically closes after 3 days
• Writes a message "This issue has been automatically closed because it was answered and there was no follow-up discussion."

All of these parameters can be changed. Though the bot currently can't make a distinction between anyone replying, or restricting to only the original poster for instance.

This bot can be generalized to manage multiple labels. If we want it to cover also more-info-needed for instance, we could have a .yml file like this one: https://github.com/svlandeg/TestRepo/blob/master/.github/workflows/issue-manager.yml

Let's merge-squash these commits - JSON as a string in YAML proved to be a bit of a challenge at least for me 😇

Types of change

enhancement

Checklist

• I have submitted the spaCy Contributor Agreement.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.