Stale set up

.github/stale.yml

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+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale Issue or Pull Request is closed
+# daysUntilClose: 7
+# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
+exemptLabels:
+  - "status: needs review"
+  - "status: needs testing"
+  - "status: needs decision"
+  - "status: ready to merge"
+# Label to use when marking as stale
+staleLabel: "status: stale"
+# Comment to post when marking as stale. Set to `false` to disable
+markComment: |
+  This pull request has been automatically marked as stale because it hasn't had
+  any activity in the past 60 days. Commenting or adding a new commit to the
+  pull request will revert this.
+  
+  Come back whenever you have time. We look forward to your contribution.
+# Comment to post when removing the stale label. Set to `false` to disable
+unmarkComment: false
+# Comment to post when closing a stale Issue or Pull Request. Set to `false` to disable
+closeComment: false
+# Limit to only `issues` or `pulls`
+only: pulls