Create new stale issue workflow

Create new stale issue workflow that breaks up existing workflow into 4 separate parts:
1) Apply stale label to issues with no activity for 30 days
2) Remove stale label if someone comments on a stale issue
3) Close issues labeled stale with no activity for an additional 30 days
4) Reopen issue if someone comments on closed stale issue

Will temporarily disable existing stale issue workflow before merging this one for testing purposes

If this workflow works, I'll remove the old one + corresponding files

.github/workflows/new_stale_close.yml

@@ -0,0 +1,21 @@
+name: Close Stale Issues
+description: Close stale issues that have not been updated in 30 days
+resource: repository
+configuration:
+  resourceManagementConfiguration:
+    scheduledSearches:
+      - frequencies:
+          - daily:
+              time: 15:00
+        filters:
+          - hasLabel:
+              label: stale
+          - isIssue
+          - isOpen
+          - isNotAssigned
+          - noActivitySince:
+              days: 30
+        actions:
+          - addReply:
+              reply: "Closing issue due to no activity in 90 days"
+          - closeIssue