Add yaml file for automatic stale of issues (#3557)

* Add yaml file for automatic stale of issues

* Add newline

* Adjust stale config

* Increase daysUntilStale

Author: dsilhavy

.github/stale.yml

@@ -0,0 +1,23 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 150
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+    - "Feature Request"
+    - "Feature request from DASH IF IOP"
+    - "Pri-Critical"
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Limit to only `issues` or `pulls`
+only: issues
+# 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. Thank you
+    for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: >
+    This issue has been automatically closed because no further activity occurred. If you think this issue is still relevant please reopen it. Thank you
+    for your contributions.
+