Add stalebot config

Author: dfreedm

.github/stale.yml

@@ -0,0 +1,12 @@
+# Mark issues stale after 1 year
+daysUntilStale: 365
+# Delete stale issues after 2 years
+daysUntilClose: 730
+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.
+closeComment: >
+  This issue has been automatically closed after being marked stale. If you're
+  still facing this problem with the above solution, please comment and we'll
+  reopen!