Create config.yaml (#2608)

Author: sensuikan1973

.gemini/config.yaml

@@ -0,0 +1,12 @@
+---
+# A configuration files for the Gemini Code Assist bot.
+#
+# https://developers.google.com/gemini-code-assist/docs/customize-gemini-behavior-github.
+
+have_fun: false
+
+code_review:
+  pull_request_opened:
+    help: false
+    summary: false
+    code_review: true