feat(seo): add sitemap generator

app/(app)/books/nbs/page.tsx

@@ -6,6 +6,8 @@ import { notFound } from "next/navigation";
 import { getBookMeta } from "@/lib/api";
 import { ogForBook } from "@/lib/og";
 import { PageHeader } from "@/components/layout/page-header";
+import { JsonLd } from "@/components/seo/json-ld";
+import { bookJsonLd } from "@/lib/jsonld";
 import { Card, CardContent } from "@/components/ui/card";
 import { ExtractedVerseCount } from "../extracted-verse-count";
 import fs from "fs";
@@ -79,6 +81,7 @@ export default async function NbsPage() {
 
   return (
     <div className="min-h-screen bg-background">
+      <JsonLd data={bookJsonLd({ path: "/books/nbs", name: "Nārada-bhakti-sūtra" })} />
       <PageHeader>
         <Link
           href="/books"