Stale issue github workflow

[ramin]

Overview

Adds a basic stale issue and PR workflow. Will run one a day. I've only moderately changed the defaults so it is less aggressive on closing old issues. I also added recognition of a keep-open label that we can add add to an issue to....keep it open if we really love one of these old issues and consider it part of the team now

PRs will

• get a stale tag after 60 days
• be autoclosed 14 days after no additional activity

Issues

• get a stale tag after 90 days
• be autoclosed 21 days after no additional activity
• can be kept alive with keep-open

Checklist

• [n/a] New and updated code has appropriate documentation
• [n/a ] New and updated code has new and/or updated testing
• Required CI checks are passing
• [n/a] Visual proof for any user facing features like CLI or documentation updates
• [n/a] Linked issues closed with keywords

[Wondertan]

How does it work for existing issues and PRs? Will it count the inactivity from when the workflow starts, or will it immediately mark all the old issues and PRs as stale?

[ramin]

How does it work for existing issues and PRs? Will it count the inactivity from when the workflow starts, or will it immediately mark all the old issues and PRs as stale?

@Wondertan it'll just start looking at everything. There IS a config to set a start-date param we can set which will only look at PRs and Issues created after the date. Shall we set that from today and it'll just sweep going forward?

https://github.com/actions/stale#start-date

[Wondertan]

Shall we set that from today and it'll just sweep going forward?

SGTM

[codecov-commenter]

Codecov Report

Merging #2667 (e21eeae) into main (bf31c4f) will increase coverage by 0.16%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2667      +/-   ##
==========================================
+ Coverage   51.16%   51.33%   +0.16%     
==========================================
  Files         159      159              
  Lines       10697    10697              
==========================================
+ Hits         5473     5491      +18     
+ Misses       4742     4729      -13     
+ Partials      482      477       -5     

see 5 files with indirect coverage changes