refactor(benchmark): use react-router instead of just vite

pkgs/benchmark/vite.config.ts

@@ -1,18 +1,12 @@
-import { defineConfig, type PluginOption } from "vite";
-import react from "@vitejs/plugin-react";
+import { defineConfig } from "vite";
+import { reactRouter } from "@react-router/dev/vite";
 import wasm from "vite-plugin-wasm";
 import topLevelAwait from "vite-plugin-top-level-await";
 
-const plugins: () => Array<PluginOption> = () => [
-	react(),
-	wasm(),
-	topLevelAwait(),
-];
-
 // https://vite.dev/config/
 export default defineConfig({
-	plugins: plugins(),
+	plugins: [reactRouter(), wasm(), topLevelAwait()],
 	worker: {
-		plugins,
+		plugins: () => [wasm(), topLevelAwait()],
 	},
 });