Use Markdown Render Hooks for images and links

[reuixiy]

https://github.com/gohugoio/hugo/releases/tag/v0.62.0

[reuixiy]

Note that this is only supported with the Goldmark renderer.

— https://gohugo.io/getting-started/configuration-markup/#markdown-render-hooks

So I will work on this once this issue and this issue related to goldmark is resolved.

[reuixiy]

1. https://discourse.gohugo.io/t/simple-image-render-hook-template-for-responsive-images/22464
2. https://discourse.gohugo.io/t/handle-external-links-with-render-hook-templates/22452

[reuixiy]

Annoying goldmark problems：

1. Linkify extension
   1. https://example.com/中文 -> <a href="https://example.com/">https://example.com/</a>中文
   2. 中文：https://www.google.com -> 中文：https://www.google.com
2. Typographer extension
   Apostrophes in contractions are not converted to right single quote yuin/goldmark#39

Solution for 1: use < and > to include URL, e.g. <https://example.com/中文>, 中文：<https://www.google.com>. Ref: yuin/goldmark#70 (comment)

[reuixiy]

Currently, I have encountered some problems in Hugo Markdown Render Hooks, such as it won't append to the links that handled by auto link. So temporary I won't work on this until Hugo release a more stable version. And close this issue temporarily.

[dawnow]

昨天Hugo和Meme都更新到了最新，我也是遇到同样的问题，发现图片链接里面有空格就渲染不了，我还改链接改了一篇，上来一查，果然是hugo的问题，现在用开发者的方法就可以了，感谢！