Set locked thread inactivity count to default 365.
Add 'needs more info' as an obvious on its face exception.
The default seems quite an inconventient, very strict thing t do:
it will lock threads that are closed and quiet because they have
been quiet and closed. This seems to make it hard to talk about
issues after they are closed or contribute. I can as a fish-shell
contributor, but that's not really the point.
Practically, right now to reply to any PR or any issue fixed in
July, well you can't.
We've been getting a bunch of comments on old closed issues. Instead
people should create new ones.
This adds a github "workflow" that should lock closed issues/prs after
90 days, except those labelled "question".
Let's see how it works out.
