Check PR

Do one pass over PR $ARGUMENTS: check CI, read reviews, fix what's actionable, report status.

1. Gather PR state

# Overall state
gh pr view $ARGUMENTS --repo docker/docs --json state,title,url,headRefName

# CI checks
gh pr checks $ARGUMENTS --repo docker/docs --json name,state,detailsUrl

# Top-level reviews
gh pr view $ARGUMENTS --repo docker/docs --json reviews,reviewDecision