feat(docs-site): add agent-readable docs routes

docs-site/app/llms.mdx/docs/[[...slug]]/route.ts

@@ -0,0 +1,27 @@
+import {
+  getLlmDocsPage,
+  getLlmDocsPages,
+  getPageMarkdown,
+} from "@/lib/llm-docs";
+import { notFound } from "next/navigation";
+
+export const dynamic = "force-static";
+
+export async function GET(
+  _request: Request,
+  props: { params: Promise<{ slug?: string[] }> },
+) {
+  const params = await props.params;
+  const page = getLlmDocsPage(params.slug);
+  if (!page) notFound();
+
+  return new Response(await getPageMarkdown(page), {
+    headers: {
+      "Content-Type": "text/markdown; charset=utf-8",
+    },
+  });
+}
+
+export function generateStaticParams() {
+  return getLlmDocsPages().map((page) => ({ slug: page.slug }));
+}