Reintroduce `config.md` details

What is the type of issue?

_No response_

What is the issue?

I used to copy-paste the config.md to coding agents to easily give them context about how to configure codex CLI. Doing cmd+a and cmd+c on https://developers.openai.com/codex/config-reference is much noisier (the copy page button doesn't work, I get this:

# Configuration Reference

Use this page as a searchable reference for `~/.codex/config.toml`. For conceptual guidance and examples, start with [Basic Config](/codex/config-basic) and [Advanced Config](/codex/config-advanced).

<ConfigTable
  title="Configuration options"
  options={configOptions}
  client:load
/>

Please re-introduce config.md to make it easy to add context to LLMs.

Where did you find it?

_No response_