Migrate website to Docusaurus

https://docusaurus.io/

docs/sidebars.js

@@ -0,0 +1,14 @@
+// @ts-check
+
+/** @type {import('@docusaurus/plugin-content-docs').SidebarsConfig} */
+const sidebars = {
+  tutorialSidebar: [
+    { type: 'autogenerated', dirName: '.' },
+    {
+      type: 'html',
+      value: '<div id="sidebar-ads"></div>'
+    }
+  ]
+};
+
+module.exports = sidebars;