add stale branches

Author: Deland-Han

.github/workflows/manage_stale_branches.yml

@@ -0,0 +1,22 @@
+name: Manage Stale Branches
+
+permissions:
+  contents: write
+      
+on:
+  workflow_dispatch:
+  
+
+jobs:
+
+  stale-branch:
+    if: github.repository_owner == 'MicrosoftDocs'
+    uses: MicrosoftDocs/microsoft-365-docs/.github/workflows/Shared-StaleBranch.yml@workflows-prod
+    with:
+        PayloadJson: ${{ toJSON(github) }}
+        RepoBranchSkipList: '[
+                              "automation"
+                             ]'
+        ReportOnly: true
+    secrets:
+        AccessToken: ${{ secrets.GITHUB_TOKEN }}