Close PRs that are inactive for 4 months (#256)

Author: nkzou

Diff for: .github/workflows/stale.yml

@@ -0,0 +1,42 @@
+# Configuration for https://github.com/actions/stale
+
+name: "Stale issues and pull requests"
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: >-
+            Thanks for your contribution!
+
+
+            This issue has been automatically marked as stale because it has not had
+            activity in the last 30 days. Note that the issue will not be automatically
+            closed, but this notification will remind us to investigate why there's
+            been inactivity. Thank you for participating in the Datadog open source community.
+
+
+            If you would like this issue to remain open:
+
+              1. Verify that you can still reproduce the issue in the latest version of this project.
+
+              1. Comment that the issue is still reproducible and include updated details requested in the issue template.
+          days-before-stale: 30
+          days-before-close: 99999
+          days-before-pr-close: 90
+          stale-issue-label: "stale"
+          exempt-issue-labels: "stale/exempt"
+          stale-pr-message: >-
+            This PR has been automatically marked as stale because it has not had activity in the last 30 days.
+
+            If there is no activity for another 90 days, this issue will be automatically closed.
+          stale-pr-label: "stale"
+          exempt-pr-labels: "stale/exempt"
+          delete-branch: true

Diff for: repository.datadog.yaml

@@ -0,0 +1,4 @@
+---
+schema-version: v1
+kind: stale-branches
+max_age: 2920h # 4 months