[WIP] Sync Codex CLI upstream changes to latest commit#9

Copilot wants to merge 2 commits intomainmanagedcode/CodexSharpSDK:mainfrom

copilot/sync-codex-cli-upstream-changes-another-onemanagedcode/CodexSharpSDK:copilot/sync-codex-cli-upstream-changes-another-oneCopy head branch name to clipboard