feat: html code highlighter

server/modules/rendering/html-codehighlighter/renderer.js

@@ -0,0 +1,17 @@
+const hljs = require('highlight.js')
+
+module.exports = {
+  async init($, config) {
+    $('pre > code').each((idx, elm) => {
+      const lang = $(elm).attr('lang')
+      if (lang) {
+        $(elm).html(hljs.highlight(lang, $(elm).text(), true).value)
+      } else {
+        const result = hljs.highlightAuto($(elm).text())
+        $(elm).html(result.value)
+        $(elm).attr('lang', result.language)
+      }
+      $(elm).parent().addClass('hljs')
+    })
+  }
+}