chore: uiv2 docz custom page (#1511)

* feat: Customized Docz Layout

* manually apply padding into playground

* fix playground bug -- sticky items

* fix window

* remove specifc tailwind style for docz

platform/ui/src/components/Icon/icon.mdx

@@ -13,12 +13,14 @@ import { ICONS } from './getIcon';
 ## Basic usage
 
 <Playground>
-  <Icon name="active" className="text-custom-aquaBright m-4" />
+  <div className="p-4">
+    <Icon name="active" className="text-custom-aquaBright m-4" />
+  </div>
 </Playground>
 
 ## All Icons
 
-<div className="flex flex-wrap items-center bg-black py-8">
+<div className="p-4 flex flex-wrap items-center bg-black py-8">
   {Object.keys(ICONS)
     .sort()
     .map((name, i) => {