SEO audit tool

A common task is to crawl a site, analyzing page content, meta tags, etc. It would be a nice time-saving feature to have the CMS perform this analysis and produce an interactive, or downloadable report.

My initial thoughts are that this could be broken into a few categories. Search and Social.
* **Search** would report on titles, descriptions, word count of page, structured data, redirects pointing to that page, etc.
* **Social** would check for opengraph and twitter settings, and maybe render a preview of what that would look like

This feature could potentially live in the SEO settings panel. Additionally, we could potentially add some of this of the SEO tab on each page, similar to what Yoast does for WordPress.

未指定任何文件、测试或入口点。首先查看 issue 中提到的 SEO 设置面板和每页 SEO 标签页，然后确定 Search and Social checks 的范围和报告格式。Done 应意味着 CMS 能够爬取一个网站，并生成约定的交互式或可下载审计报告。

由索引模型根据 Issue 内容生成。