add coderabbit configuration

.coderabbit.yaml

@@ -0,0 +1,19 @@
+# https://docs.coderabbit.ai/guides/configure-coderabbit/
+---
+language: "en-US"
+early_access: true
+reviews:
+  profile: "chill"
+  request_changes_workflow: false
+  high_level_summary: true
+  poem: true
+  review_status: true
+  collapse_walkthrough: false
+  auto_review:
+    enabled: true
+    drafts: false
+chat:
+  auto_reply: true
+knowledge_base:
+  scope: "global"
+...