[FEATURE] codex integration

## Feature Description

I realize this will likely be marked as out of scope, but I figured I would try. Worst case, it'll stick around in closed issues as a warning to others.

I quite enjoyed this plugin up until I switched to codex recently. It would be nice to have it continue working, especially after I spent time setting things up.

Any effort here would be appreciated and I am happy to help test. Thank you!

未指定文件、测试或入口点。首先检查现有的 Claude Code 集成，并确定应如何支持 Codex；在实现之前与维护者明确预期行为和验收标准。完成意味着插件对 Codex 用户仍能正常工作，并且集成已通过适当的验证得到覆盖。

由索引模型根据 Issue 内容生成。