feat: add rehype-prism-plus and docs

lib/mdx.js

@@ -86,7 +86,7 @@ export async function getFileBySlug(type, slug) {
       options.rehypePlugins = [
         ...(options.rehypePlugins ?? []),
         require('rehype-katex'),
-        require('@mapbox/rehype-prism'),
+        [require('rehype-prism-plus'), { ignoreMissing: true }],
         () => {
           return (tree) => {
             visit(tree, 'element', (node, index, parent) => {

lib/remark-code-title.js

@@ -4,8 +4,8 @@ module.exports = function (options) {
   return (tree) =>
     visit(tree, 'code', (node, index) => {
       const nodeLang = node.lang || ''
-      let language = '',
-        title = ''
+      let language = ''
+      let title = ''
 
       if (nodeLang.includes(':')) {
         language = nodeLang.slice(0, nodeLang.search(':'))