chore: add stalebot (#3096)

.github/stale.yml

@@ -0,0 +1,22 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 90
+# Never close the issues
+daysUntilClose: false
+
+# exempt every other kind of issues expect kind/bug
+exemptLabels:
+  - kind/discussion
+  - kind/docs
+  - kind/feature
+  - kind/improvement
+  - kind/question
+  - kind/regression
+
+# Label to use when marking an issue as stale
+staleLabel: status/needs-action
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: false
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false
+# Limit to only `issues`
+only: issues