Add stale behaviour for issue outdated

Author: mistraloz

.github/stale.yml

@@ -0,0 +1,23 @@
+# Documentation https://github.com/marketplace/actions/close-stale-issues
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - enhancement
+  - enhancement requested
+  - bug confirmed
+  - information
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Please
+  update it if any action still required.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: >
+  This issue has been automatically closed because it has not had recent activity.
+  Please, reopen if you need.