chore(ci): add "Close inactive issues" workflow (mammadataei#40)

.github/workflows/close-stale-issues.yml

@@ -0,0 +1,27 @@
+name: Close stale issues
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v7
+        with:
+          days-before-issue-stale: 30
+          days-before-issue-close: 14
+          stale-issue-label: 'stale'
+          stale-issue-message:
+            This issue is automatically marked as stale because it has been open
+            for 30 days with no activity. Remove the stale label or leave a
+            comment, or 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. Please feel free to open a new issue if you have any
+            further questions.'
+          days-before-pr-stale: -1
+          days-before-pr-close: -1