Add auto assign reviewer workflow (#346)

Signed-off-by: Andy Lee <andy.lee@suse.com>

.github/auto-assign-config.yaml

@@ -0,0 +1,7 @@
+addAssignees: author
+addReviewers: true
+numberOfReviewers: 0
+reviewers:
+- a110605
+- houhoucoop
+- NickChungSUSE

.github/workflows/auto-assign-reviewer.yaml

@@ -0,0 +1,16 @@
+name: "[PR Management] Auto Assign Reviewer"
+
+on:
+  pull_request_target:
+    types: [opened, ready_for_review]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  auto-assign:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: rancher/gh-issue-mgr/auto-assign-action@main
+      with:
+        configuration-path: .github/auto-assign-config.yaml