feat(blog): add sitemap.ts with blog and blog post URLs

- Create sitemap.ts with MetadataRoute.Sitemap for Next.js
- Include all static pages with priorities and change frequencies
- Include /blog index page (priority 0.8, daily updates)
- Dynamically include all published blog post URLs (/blog/[slug])
- Blog posts use publish_date as lastModified

The sitemap is referenced by robots.ts at /sitemap.xml

MKT-71

apps/web-roo-code/src/app/sitemap.ts

@@ -0,0 +1,120 @@
+import type { MetadataRoute } from "next"
+import { SEO } from "@/lib/seo"
+import { getAllBlogPosts } from "@/lib/blog"
+
+/**
+ * Generate sitemap for the website
+ * Includes all static pages and dynamically generated blog post URLs
+ *
+ * @see https://nextjs.org/docs/app/api-reference/file-conventions/metadata/sitemap
+ */
+export default function sitemap(): MetadataRoute.Sitemap {
+	const baseUrl = SEO.url
+
+	// Static pages with their last modified dates and priorities
+	const staticPages: MetadataRoute.Sitemap = [
+		{
+			url: baseUrl,
+			lastModified: new Date(),
+			changeFrequency: "daily",
+			priority: 1,
+		},
+		{
+			url: `${baseUrl}/pricing`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.9,
+		},
+		{
+			url: `${baseUrl}/extension`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.8,
+		},
+		{
+			url: `${baseUrl}/cloud`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.8,
+		},
+		{
+			url: `${baseUrl}/slack`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.7,
+		},
+		{
+			url: `${baseUrl}/provider`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.7,
+		},
+		{
+			url: `${baseUrl}/enterprise`,
+			lastModified: new Date(),
+			changeFrequency: "monthly",
+			priority: 0.7,
+		},
+		{
+			url: `${baseUrl}/evals`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.6,
+		},
+		{
+			url: `${baseUrl}/reviewer`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.6,
+		},
+		{
+			url: `${baseUrl}/pr-fixer`,
+			lastModified: new Date(),
+			changeFrequency: "weekly",
+			priority: 0.6,
+		},
+		// Blog index page
+		{
+			url: `${baseUrl}/blog`,
+			lastModified: new Date(),
+			changeFrequency: "daily",
+			priority: 0.8,
+		},
+		// Legal pages
+		{
+			url: `${baseUrl}/terms`,
+			lastModified: new Date(),
+			changeFrequency: "monthly",
+			priority: 0.3,
+		},
+		{
+			url: `${baseUrl}/privacy`,
+			lastModified: new Date(),
+			changeFrequency: "monthly",
+			priority: 0.3,
+		},
+		{
+			url: `${baseUrl}/legal/cookies`,
+			lastModified: new Date(),
+			changeFrequency: "monthly",
+			priority: 0.2,
+		},
+		{
+			url: `${baseUrl}/legal/subprocessors`,
+			lastModified: new Date(),
+			changeFrequency: "monthly",
+			priority: 0.2,
+		},
+	]
+
+	// Get all published blog posts and generate URLs
+	const blogPosts = getAllBlogPosts()
+	const blogPages: MetadataRoute.Sitemap = blogPosts.map((post) => ({
+		url: `${baseUrl}/blog/${post.slug}`,
+		lastModified: new Date(post.publish_date),
+		changeFrequency: "monthly" as const,
+		priority: 0.7,
+	}))
+
+	return [...staticPages, ...blogPages]
+}