feat: add sitemap and robots

apps/landing/src/app/robots.ts

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

apps/landing/src/app/sitemap.ts

@@ -0,0 +1,12 @@
+import { MetadataRoute } from 'next';
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  return [
+    {
+      url: 'https://banatie.app/',
+      lastModified: new Date(),
+      changeFrequency: 'weekly',
+      priority: 1,
+    },
+  ];
+}