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/sitemap.ts

@@ -0,0 +1,24 @@
+import { MetadataRoute } from 'next'
+import { i18n } from './dictionaries'
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  const baseUrl = 'https://moygroup.com.tr'
+  
+  // Public pages defined in the project
+  const pages = ['', '/kurumsal', '/galeri', '/iletisim', '/menu', '/sss']
+  
+  const sitemapEntries: MetadataRoute.Sitemap = []
+  
+  for (const locale of i18n.locales) {
+    for (const page of pages) {
+      sitemapEntries.push({
+        url: `${baseUrl}/${locale}${page}`,
+        lastModified: new Date(),
+        changeFrequency: page === '' ? 'weekly' : 'monthly',
+        priority: page === '' ? 1 : 0.8,
+      })
+    }
+  }
+
+  return sitemapEntries
+}