feat(site): split llms.txt into per-framework and blog sub-indexes (#697)

site/astro.config.mjs

@@ -57,7 +57,14 @@ export default defineConfig({
     }),
     mdx({ extendMarkdownConfig: true }),
     sitemap({
-      customPages: [`${SITE_URL}/llms.txt`],
+      // llms-markdown.ts auto-generates per-framework sub-indexes, but sitemap
+      // entries are hardcoded here. Add a new line when adding a framework.
+      customPages: [
+        `${SITE_URL}/llms.txt`,
+        `${SITE_URL}/blog/llms.txt`,
+        `${SITE_URL}/docs/framework/html/llms.txt`,
+        `${SITE_URL}/docs/framework/react/llms.txt`,
+      ],
     }),
     pagefind(),
     llmsMarkdown(),