Add shared Manifest UI for delivery, quote, and order.

Wire quote/order API clients and routes, then unify list/create/edit behind ManifestList/Form tiles so Lieferungen and Auftrag share one stack.

src/pages/auftrag/bestellung.jsx

@@ -1,13 +1,9 @@
 import { PureComponent } from 'react';
-import Typography from '@mui/material/Typography';
+import { ManifestList } from '../../components/manifest';
 
 class AuftragBestellungPage extends PureComponent {
   render() {
-    return (
-      <Typography color="text.secondary">
-        Bestellung — Inhalt folgt.
-      </Typography>
-    );
+    return <ManifestList kind="order" />;
   }
 }