Automerge PRs action

[yarikoptic]

xref:

• https://github.com/bids-standard/bids-specification/issues/147

Inspired by

• https://github.com/bids-standard/bids-specification/pull/1774#issuecomment-2115310934

TODOs

• [x] create automerge label (created, we didn't have any)
• [ ] fix that crap chatgpt produced... or just find a working example of such workflow elsewhere...
• [ ] see if all desired outputs actually produce what is needed
• [ ] may be test on some other repo where we can trick the dates of commits etc
• [ ] uncomment and do provide GITHUB_TOKEN

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.92%. Comparing base (3fd21ff) to head (ab35dd2).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1823   +/-   ##
=======================================
  Coverage   87.92%   87.92%           
=======================================
  Files          16       16           
  Lines        1375     1375           
=======================================
  Hits         1209     1209           
  Misses        166      166           

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[jwodder]

Even if this succeeds in merging PRs after 5 days, it won't prevent merging before the 5 days are up, which seems like the more important qualification to me.