Adding stale PR workflow, but commented out until we get this repo up to date

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+---
+# close-stale-issues (https://github.com/marketplace/actions/close-stale-issues)
+# name: Close stale PRs
+# on:  # yamllint disable-line rule:truthy
+#   schedule:
+#     - cron: 0 4 * * *
+
+# jobs:
+#   stale:
+#     runs-on: ubuntu-latest
+#     steps:
+#       - uses: actions/stale@v5
+#         with:
+#           close-pr-message: >
+#             This PR has been automatically closed due to lack of activity.
+#           days-before-stale: 30
+#           days-before-close: 7
+#           operations-per-run: 100
+#           remove-stale-when-updated: false
+#           stale-pr-label: stale
+#           stale-pr-message: >
+#             This PR has been automatically marked as stale because it has not
+#             had recent activity. It will be closed automatically if no further
+#             progress is made.