docs: Improve docs with core-concept and guides

apps/wiki/app/llms.mdx/[[...slug]]/route.ts

@@ -0,0 +1,24 @@
+import {getLLMText} from '@/lib/get-llm-text';
+import {source} from '@/lib/source';
+import {notFound} from 'next/navigation';
+
+export const revalidate = false;
+
+export async function GET(
+  _req: Request,
+  props: {params: Promise<{slug?: string[]}>},
+) {
+  const params = await props.params;
+  const page = source.getPage(params.slug);
+  if (!page) notFound();
+
+  return new Response(await getLLMText(page), {
+    headers: {
+      'Content-Type': 'text/markdown',
+    },
+  });
+}
+
+export function generateStaticParams() {
+  return source.generateParams();
+}