Add .claude local files to gitignore (#17402)

### Summary
Claude code will store local settings in `.claude/settings.local.json`.
It is [recommended to add this pattern to
gitignore](https://code.claude.com/docs/en/settings).

Author: rascani

.gitignore

@@ -70,3 +70,6 @@ xcuserdata/
 # Windows
 *.dll
 *.pyd
+
+# Agents
+.claude/*.local.*