chore: add workflow files for closing stale issues (#2174)

.github/workflows/close_stale_issues.yml

@@ -0,0 +1,22 @@
+name: Close inactive issues
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v5
+        with:
+          days-before-issue-stale: 30
+          days-before-issue-close: 14
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 30 days with no activity."
+          close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          repo-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/manually_clear_old_issues.yml

@@ -0,0 +1,24 @@
+name: Clear Old Issues
+on:
+  workflow_dispatch:
+
+jobs:
+  cleanup-old-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v5
+        with:
+          days-before-issue-stale: 60
+          days-before-issue-close: 0
+          stale-issue-label: "auto-closed"
+          stale-issue-message: ""
+          close-issue-message: "This issue has been automatically closed due to 60 days of inactivity."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          exempt-issue-labels: ""
+          only-issue-labels: ""
+          remove-stale-when-updated: true
+          repo-token: ${{ secrets.GITHUB_TOKEN }}