chore: import upstream snapshot with attribution

apps/docs/app/llms-full.txt/route.ts

@@ -0,0 +1,31 @@
+import { getLLMText } from '@/lib/llms'
+import { source } from '@/lib/source'
+
+export const revalidate = false
+
+export async function GET() {
+  try {
+    const pages = source.getPages().filter((page) => {
+      if (!page || !page.data || !page.url) return false
+
+      const pathParts = page.url.split('/').filter(Boolean)
+      const hasLangPrefix = pathParts[0] && ['es', 'fr', 'de', 'ja', 'zh'].includes(pathParts[0])
+
+      return !hasLangPrefix
+    })
+
+    const scan = pages.map((page) => getLLMText(page))
+    const scanned = await Promise.all(scan)
+
+    const filtered = scanned.filter((text) => text && text.length > 0)
+
+    return new Response(filtered.join('\n\n---\n\n'), {
+      headers: {
+        'Content-Type': 'text/plain; charset=utf-8',
+      },
+    })
+  } catch (error) {
+    console.error('Error generating LLM full text:', error)
+    return new Response('Error generating full documentation text', { status: 500 })
+  }
+}