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/robots.ts

@@ -0,0 +1,11 @@
+import { MetadataRoute } from 'next'
+
+export default function robots(): MetadataRoute.Robots {
+  return {
+    rules: {
+      userAgent: '*',
+      allow: '/',
+    },
+    sitemap: 'https://moygroup.com.tr/sitemap.xml',
+  }
+}