Add initial "dry run" action for stale issues/PRs (#3170)

Author: nicolaihenriksen

.github/workflows/stale_issues_and_prs.yml

@@ -0,0 +1,24 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v8
+        with:
+          stale-issue-message: 'This issue is marked stale because it has been open 30 days with no activity. Remove stale label or update the issue, otherwise it will be closed in 14 days.'
+          stale-pr-message: 'This PR is marked stale because it has been open 60 days with no activity. Remove stale label or update the PR, otherwise it will be closed in 14 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 14 days with no activity.'
+          close-pr-message: 'This PR was closed because it has been stalled for 14 days with no activity.'
+          only-issue-labels: Waiting on feedback            # Only consider issues with 'Waiting on feedback' labels
+          exempt-draft-pr: true                             # Do not consider a draft PR stale
+          exempt-all-pr-milestones: true                    # Do not consider a PR associated with a Milestone stale
+          days-before-stale: 30
+          days-before-pr-stale: 60
+          days-before-close: 14
+          ascending: true                                   # Start with the oldest issues/PRs first
+          debug-only: true                                  # Currently only doing "dry runs" until we're satisfied with the configuration
+          operations-per-run: 1000                          # GitHub API calls are rate limited. When debug-only is "false", this value should be approx. 30 (default) or less