[FEATURE]: Multiple account login with Codex OAuth and round robin load balancing

[shahid0]

Feature hasn't been suggested before.

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Describe the enhancement you want to request

Requesting support for logging in with multiple accounts using Codex OAuth, and to have round robin load balancing between them. This will enable users to manage and use several accounts more efficiently, leveraging OAuth for streamlined and secure authentication. Round robin load balancing should ensure requests are distributed evenly among the active accounts, improving both throughput and reliability for high-usage scenarios.