Add AI Proxy function in codex provider

[MikoyChinese]

Hi,
The lastest release API format proxy only supports the Claude Code provider. Is there any plan to support converting OpenAI Chat/Completions format to the Responses API in Codex provider?
Alternatively, add a proxy page in the menu that supports converting between different API formats?

[MikoyChinese]

#76 And this issue should be fixed.