feat: add bottom fade mask utility and enhance Playground layout

src/routes/option-index.tsx

@@ -1,12 +1,12 @@
 import OptionLayout from "~/components/Layouts/Layout"
 import { Playground } from "~/components/Option/Playground/Playground"
 
- const OptionIndex = () => {
+const OptionIndex = () => {
   return (
     <OptionLayout>
-      <Playground />
+        <Playground />
     </OptionLayout>
   )
 }
 
-export default OptionIndex
+export default OptionIndex