When opening plex Oauth window, open an empty page then redirect to plex oauth (#127)

* feat(frontend): custom toast

* refactor(frontend): move toast width styling to globals

* feat(frontend): add loading spinner for browser popup

src/pages/login/index.tsx

@@ -0,0 +1,9 @@
+import React from 'react';
+import type { NextPage } from 'next';
+import Login from '../../components/Login';
+
+const LoginPage: NextPage = () => {
+  return <Login />;
+};
+
+export default LoginPage;