refactor: flatten monorepo into standalone project

src/router.tsx

@@ -0,0 +1,33 @@
+import { QueryClient } from '@tanstack/react-query'
+import { createRouter } from '@tanstack/react-router'
+import { setupRouterSsrQueryIntegration } from '@tanstack/react-router-ssr-query'
+import type { RouterContext } from './routes/__root'
+import { routeTree } from './routeTree.gen'
+
+export const getRouter = () => {
+  const queryClient = new QueryClient({
+    defaultOptions: {
+      queries: {
+        staleTime: 30 * 1000,
+        retry: 1,
+      },
+    },
+  })
+
+  const router = createRouter({
+    routeTree,
+    context: {
+      queryClient,
+    } satisfies RouterContext,
+
+    scrollRestoration: true,
+    defaultPreloadStaleTime: 0,
+  })
+
+  setupRouterSsrQueryIntegration({
+    router,
+    queryClient,
+  })
+
+  return router
+}