allow config per repo

[smichea]

depending on the repository I am working on, I would like to be able to using different configuration (for instance model).
Instead of looking only the config in ~/.codex directory for the conf files, codex should also check in ./.codex

[prashanFOMO]

this is very much needed to configure safe commands on a repo basis and share Codex configuration.

[codex-maintainers]

Thank you for the feedback! Please try the latest version of Codex CLI to see if this issue persists. We're primarily focused on the native/Rust implementation of Codex CLI, and if the issue remains, we'd be happy to consider it for the codex-rs/ implementation.