chore: add stale tracking for old issues and PRs (#950)

.github/workflows/stale.yaml

@@ -0,0 +1,26 @@
+on:
+  schedule:
+    - cron: "42 3 * * *"
+
+# see https://docs.github.com/en/actions/managing-issues-and-pull-requests/closing-inactive-issues
+jobs:
+  stale-issues:
+    name: Close inactive issues and PRs
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@1160a2240286f5da8ec72b1c0816ce2481aabf84 # v8.0.0
+        with:
+          days-before-issue-stale: 365
+          days-before-issue-close: 7
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for over a year with no activity. Remove stale label or add a comment to avoid this being closed in a weeks time."
+          close-issue-message: "This issue was closed because it has been inactive for a week since being marked as stale."
+          days-before-pr-stale: 60
+          days-before-pr-close: 7
+          stale-pr-label: "stale"
+          stale-pr-message: "This PR is stale because it has been open for two months with no activity. Remove stale label or add a comment to avoid this being closed in a weeks time."
+          close-pr-message: "This PR was closed because it has been inactive for a week since being marked as stale."
+          ascending: true