feat(notation-legend): Added notation-legend pattern for docs

packages/notation-legend/example/public/App.js

@@ -0,0 +1,16 @@
+import React from 'react'
+import freesewing from '@freesewing/core'
+import { Workbench } from '@freesewing/components'
+import 'typeface-roboto-condensed'
+import '@freesewing/css-theme'
+import './App.css'
+
+import Pattern from 'pattern'
+
+const App = (props) => {
+  let instance = new Pattern()
+  let config = instance.config
+  return <Workbench freesewing={freesewing} Pattern={Pattern} config={config} userLanguage="en" />
+}
+
+export default App