bug: add readline to support history, tab completion, and key bindings

What version of Codex is running?

OpenAI Codex (research preview) v0.1.2504161551

Which model were you using?

o4-mini

What platform is your computer?

MacOS Darwin 24.4.0 arm64 arm

What steps can reproduce the bug?

not a bug, but enhancement. Add command history and readline support so that I can 'up arrow' through past commands and take advantage of all of the other native readline options

What is the expected behavior?

ability to use up arrow to access last commands from prior session
ability to keep a session command history

What do you see instead?

_No response_

Additional information

_No response_