codex-plugin-cc v1.0.13 - launch attribution cleanup

This release removes the final public-readiness drift found by the adversarial
X.com launch review.

Install

npm install -g codex-plugin-cc
codex-claude-review enable
codex-claude-review doctor

Corrected README upstream attribution to reference OpenAI's Apache-2.0 Codex
plugin reference preserved under plugins/codex/, instead of implying an
upstream openai/codex-plugin-cc repository.
Replaced launch-adjacent fixed version placeholders with commands or generic
instructions so future releases do not carry stale example versions.
Added a release-docs regression check preventing the incorrect upstream repo
reference from returning.