chore: add auto-assign workflows for pr assign (#3998)

Signed-off-by: Gaius <gaius.qi@gmail.com>

Author: gaius-qi

.github/auto_assign.yml

@@ -0,0 +1,18 @@
+# Set to true to add reviewers to pull requests
+addReviewers: true
+
+# Set to true to add assignees to pull requests
+addAssignees: author
+
+# A list of reviewers to be added to pull requests (GitHub user name)
+reviewers:
+  - gaius-qi
+  - yxxhero
+  - chlins
+  - CormickKneey
+  - jim3ma
+  - hyy0322
+  - xujihui1985
+
+# A number of reviewers added to the pull request
+numberOfReviewers: 3

.github/workflows/auto-assign.yml

@@ -0,0 +1,11 @@
+name: "Auto Assign"
+
+on:
+  pull_request_target:
+    types: [opened, reopened, ready_for_review]
+
+jobs:
+  add-assignee:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: kentaro-m/auto-assign-action@248761c4feb3917c1b0444e33fad1a50093b9847