feat: add /editor/create to create a flow

packages/web/src/pages/Editor/index.tsx

@@ -0,0 +1,11 @@
+import * as React from 'react';
+import { Routes, Route } from 'react-router-dom';
+import CreateFlowPage from './create';
+
+export default function Editor() {
+  return (
+    <Routes>
+      <Route path="/create" element={<CreateFlowPage />} />
+    </Routes>
+  )
+}