feat: add basic example

examples/react-tanstack-router/rsbuild.config.ts

@@ -1,6 +1,12 @@
 import { defineConfig } from '@rsbuild/core';
 import { pluginReact } from '@rsbuild/plugin-react';
+import { TanStackRouterRspack } from '@tanstack/router-plugin/rspack';
 
 export default defineConfig({
   plugins: [pluginReact()],
+  tools: {
+    rspack: {
+      plugins: [TanStackRouterRspack()],
+    },
+  },
 });