feat: implement basic seo (metadata, sitemap, robots)

src/app/robots.ts

@@ -0,0 +1,14 @@
+import { MetadataRoute } from 'next';
+
+export default function robots(): MetadataRoute.Robots {
+  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'https://trustlab.dyzulk.com';
+
+  return {
+    rules: {
+      userAgent: '*',
+      allow: '/',
+      disallow: ['/dashboard/', '/api/'],
+    },
+    sitemap: `${baseUrl}/sitemap.xml`,
+  };
+}