Related Posts Support

[finisky]

请按照此新功能模版提供相关信息，如详细的功能描述或同类效果屏幕截图，这将有助于我们进行调查。
(Please follow this new feature template to provide relevant information, such as detail description for feature or some screenshots, which will help us investigate.)

新功能描述 (New feature description)

Show related posts in the sidebar or post end

效果参考截图 (Screenshots if it possible)

[elkan1788]

Hugo 应该是自带这个插件功能的，考虑还是放到文章末尾吧，放侧边栏会太长。