👷 ci(bot): add stale and rename assign bot [no ci]

Signed-off-by: Haili Zhang <haili.zhang@outlook.com>

Author: webup

.github/workflows/assign-bot.yml .github/workflows/assign.yml.github/workflows/assign-bot.yml renamed to .github/workflows/assign.yml

@@ -0,0 +1,54 @@
+#
+# Copyright 2022 The Dapr Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+name: stale-bot
+
+on:
+  schedule:
+    - cron: '*/10 * * * *'
+  workflow_dispatch:
+
+jobs:
+  prune_stale:
+    name: Prune Stale
+    runs-on: ubuntu-latest
+    steps:
+      - name: Prune Stale
+        uses: actions/stale@v5.1.0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          days-before-issue-stale: 60
+          days-before-pr-stale: 30
+          days-before-close: 7
+          stale-issue-message: >
+            This issue has been automatically marked as stale because it has not had activity in the last 60 days. 
+            It will be closed in the next 7 days unless it is tagged (pinned, good first issue, help wanted or triaged/resolved) or other activity occurs. 
+            Thank you for your contributions.
+          close-issue-message: >
+            This issue has been automatically closed because it has not had activity in the last 67 days. 
+            If this issue is still valid, please ping a maintainer and ask them to label it as pinned, good first issue, help wanted or triaged/resolved.
+            Thank you for your contributions.
+          stale-pr-message: >
+            This pull request has been automatically marked as stale because it has not had activity in the last 30 days. 
+            It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready.
+            Thank you for your contributions!
+          close-pr-message: >
+            This pull request has been automatically closed because it has not had activity in the last 37 days. 
+            Please feel free to give a status update now, ping for review, or re-open when it's ready.
+            Thank you for your contributions!
+          stale-issue-label: 'stale'
+          exempt-issue-labels: 'pinned, good first issue, help wanted, triaged/resolved, triaged/unresolved'
+          stale-pr-label: 'stale'
+          exempt-pr-labels: 'pinned'
+          operations-per-run: 500
+          ascending: true