Merge pull request #10013 from Roasbeef/gemini-review

CI: add config.yaml for gemini code review

.gemini/config.yaml

@@ -0,0 +1,12 @@
+# Config for the Gemini Pull Request Review Bot.
+# https://github.com/marketplace/gemini-code-assist
+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
+ignore_patterns: []