Update codex using pnpm

What feature would you like to see?

When codex is installed with pnpm instead of npm, it should suggest to update itself with pnpm instead.

  ✨ Update available! 0.92.0 -> 0.93.0

  Release notes: https://github.com/openai/codex/releases/latest

› 1. Update now (runs `npm install -g @openai/codex`)
  2. Skip
  3. Skip until next version

  Press enter to continue

Additional information

_No response_