fix: type error in generated src/router.tsx (#51) (#52)

Partial fix for #51

Author: icflorescu

templates/react/add-on/start/assets/src/router.tsx.ejs

@@ -6,7 +6,7 @@ import { createIsomorphicFn } from '@tanstack/react-start'
 import { routerWithQueryClient } from '@tanstack/react-router-with-query'
 import * as TanstackQuery from './integrations/tanstack-query/root-provider'
 <% } %>
-  
+
 // Import the generated route tree
 import { routeTree } from './routeTree.gen'
 
@@ -61,6 +61,6 @@ export const createRouter = () => {
 // Register the router instance for type safety
 declare module '@tanstack/react-router' {
   interface Register {
-    router: typeof router
+    router: ReturnType<typeof createRouter>
   }
 }