Fix child route exports

Author: razor-x

codegen/lib/connect.ts

@@ -59,6 +59,14 @@ export const connect = (
     const parentPath = route.parentPath ?? ''
     routeIndexes[parentPath] ??= new Set()
     routeIndexes[parentPath]?.add(`${kebabCase(route.name)}.js`)
+
+    const hasChildren = routes.some(
+      ({ path }) => path.startsWith(route.path) && path !== route.path,
+    )
+    if (hasChildren) {
+      routeIndexes[parentPath] ??= new Set()
+      routeIndexes[parentPath]?.add(`${kebabCase(route.name)}/index.js`)
+    }
   }
 
   for (const [parentPath, routes] of Object.entries(routeIndexes)) {