feat: add CodeRabbit configuration file 📋

- Introduce `.coderabbit.yaml` for automated code reviews
- Configure language to en-US and define path filters
- Enable high-level summaries and auto-review with clippy

Signed-off-by: mingcheng <mingcheng@apache.org>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: mingcheng

.coderabbit.yaml

@@ -0,0 +1,34 @@
+#!#
+# Copyright (c) 2025 Hangzhou Guanwaii Technology Co., Ltd.
+#
+# This source code is licensed under the MIT License,
+# which is located in the LICENSE file in the source tree's root directory.
+#
+# File: .coderabbit.yaml
+# Author: mingcheng (mingcheng@apache.org)
+# File Created: 2025-09-21 17:35:09
+#
+# Modified By: mingcheng (mingcheng@apache.org)
+# Last Modified: 2025-09-21 18:51:09
+##
+
+language: en-US
+
+labels:
+  - "code-rabbit"
+
+reviews:
+  disable_cache: true
+  high_level_summary: true
+  path_filters:
+    - "**/src/**"
+    - "!target/**"
+    - "!assets/**"
+    - "!templates/**"
+    - "!*.lock"
+  auto_review:
+    enabled: true
+    drafts: false
+  tools:
+    clippy:
+      enabled: true