[next.config][s]: switch next.config from using require to import

examples/data-literate/next.config.js

@@ -1,19 +0,0 @@
-const toc = require('remark-toc')
-const slug = require('remark-slug')
-const gfm = require('remark-gfm')
-const footnotes = require('remark-footnotes')
-
-
-
-const withMDX = require('@next/mdx')({
-    extension: /\.mdx?$/,
-    options: {
-        remarkPlugins: [gfm, toc, slug, footnotes],
-        rehypePlugins: [],
-        providerImportSource: '@mdx-js/react',
-    },
-})
-module.exports = withMDX({
-    // Append the default value with md extensions
-    pageExtensions: ['ts', 'tsx', 'js', 'jsx', 'md', 'mdx'],
-})