fix: 下架 curl-crypto-plugin，补全 Codex 全家族安装命令

[leeguooooo]

• marketplace.json / README 移除 curl-crypto-plugin，README 新增 Retired 段说明原因与卸载方式（源码仓库保留）
• README 的 Codex 安装示例改为可直接复制的循环，名单与 use-family dependencies 一致，并说明只装插件、CLI 与账号初始化另做
• 新增 tests/readme-codex-list.test.sh，CI 校验 README 名单与 dependencies 一致、curl-crypto 未回到 marketplace

Closes #27
Closes #28

[coderabbitai]

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