feat(seo): implement SEO audit remediations

- Add dynamic sitemap.ts, robots.ts, and llms.txt route
- Add metadataBase and JSON-LD Organization schema to layout
- Set canonical alternates for all routes
- Migrate raw img tags to next/image for LCP optimization
- Add SEO dictionary strings to tr.json and en.json

app/[lang]/menu/page.tsx

@@ -2,9 +2,17 @@ import { SectionHeader } from "@/app/components/ui/section-header";
 import { Badge } from "@/app/components/ui/badge";
 import { getDictionary, Locale } from "../../dictionaries";
 
-export const metadata = {
-  title: "Dijital Menü | Moy Group",
-};
+export async function generateMetadata({ params }: { params: Promise<{ lang: string }> }) {
+  const { lang } = await params;
+  const dict = await getDictionary(lang as Locale);
+  return {
+    title: dict.seo.menu.title,
+    description: dict.seo.menu.description,
+    alternates: {
+      canonical: `/${lang}/menu`,
+    },
+  };
+}
 
 export default async function MenuPage({
   params,