Override probot/stale defaults, if necessary about nim

[kytrinyx]

I made a mistake.

This was not explicitly documented in the README, but probot/stale requires the presence of a .github/stale.yml file.

If you want the default behavior, you need to add an empty .github/stale.yml file to this repo, otherwise the bot will not be active.

[amscotti]

I think this is a good idea, I have added PR for adding the stale.yml file.

[kytrinyx]

Now that I've been living with this for a while, I've found that it's less useful than I originally expected, in particular for repositories where there's not a whole lot of activity (e.g. if there were hundreds of issues every week, then having a bot to automatically close them regularly is good).

The most annoying thing is where we have 10 open issues, and maybe 2 people have contributed in the past 6 months... and we hit the threshold and 8 of the issues get closed because they're stale, even though it's not an overwhelming number of issues to comb through.

[amscotti]

Yeah, I can see your point and maybe for this track it's not going to be an issue. It's easy enough to add if we want it later on. Let's close this issue and I'll close my PR. :)

[kytrinyx]

Sounds good!