feat(docs): redirect /ag-ui to https://docs.ag-ui.com/

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mxmzb

docs/next.config.mjs

@@ -470,6 +470,16 @@ const config = {
         destination: '/learn/ag-ui-protocol',
         permanent: true,
       },
+      {
+        source: '/ag-ui',
+        destination: 'https://docs.ag-ui.com/',
+        permanent: false,
+      },
+      {
+        source: '/ag-ui/:path*',
+        destination: 'https://docs.ag-ui.com/:path*',
+        permanent: false,
+      },
       {
         source: '/connect-mcp-servers',
         destination: '/learn/connect-mcp-servers',