docs: Gemini 자동 리뷰 설정 추가

Author: pooreumjung

.gemini/config.yaml

@@ -1 +1,13 @@
-styleguide: .gemini/styleguide.md
+have_fun: false
+
+code_review:
+  disable: false
+  comment_severity_threshold: MEDIUM
+  max_review_comments: -1
+  pull_request_opened:
+    help: false
+    summary: true
+    code_review: true
+    include_drafts: true
+
+ignore_patterns: []