Implement /credentials/shop/manage as flask view

static/js/src/advantage/credentials/app.tsx

@@ -4,9 +4,7 @@ import * as Sentry from "@sentry/react";
 import { QueryClient, QueryClientProvider } from "react-query";
 import { Integrations } from "@sentry/tracing";
 import { ReactQueryDevtools } from "react-query/devtools";
-import { BrowserRouter as Router, Routes, Route } from "react-router-dom";
-import CredManage from "./components/CredManage";
-import CredExamShop from "./components/CredExamShop/CredExamShop";
+import { BrowserRouter as Router, Routes } from "react-router-dom";
 
 const oneHour = 1000 * 60 * 60;
 const queryClient = new QueryClient({
@@ -36,10 +34,7 @@ function App() {
     <Sentry.ErrorBoundary>
       <QueryClientProvider client={queryClient}>
         <Router basename="/credentials/shop">
-          <Routes>
-            <Route path="/" element={<CredExamShop />} />
-            <Route path="/manage" element={<CredManage />} />
-          </Routes>
+          <Routes></Routes>
         </Router>
         <ReactQueryDevtools initialIsOpen={false} />
       </QueryClientProvider>