Revert "does it work without entries.tsx and main.tsx?"

This reverts commit 757ddc7.

examples/10_fs-router/src/entries.tsx

@@ -0,0 +1,21 @@
+import { fsRouter } from 'waku/router/server';
+
+export default fsRouter(import.meta.url, loader);
+
+function loader(dir: string, file: string) {
+  const p = file.replace(/\.\w+$/, '').split('/');
+  switch (p.length) {
+    case 1:
+      return import(`./${dir}/${p[0]}.tsx`);
+    case 2:
+      return import(`./${dir}/${p[0]}/${p[1]}.tsx`);
+    case 3:
+      return import(`./${dir}/${p[0]}/${p[1]}/${p[2]}.tsx`);
+    case 4:
+      return import(`./${dir}/${p[0]}/${p[1]}/${p[2]}/${p[3]}.tsx`);
+    case 5:
+      return import(`./${dir}/${p[0]}/${p[1]}/${p[2]}/${p[3]}/${p[5]}.tsx`);
+    default:
+      throw new Error('too deep');
+  }
+}

examples/10_fs-router/src/main.tsx

@@ -0,0 +1,19 @@
+import { StrictMode } from 'react';
+import { createRoot, hydrateRoot } from 'react-dom/client';
+import { Router } from 'waku/router/client';
+
+import { ErrorBoundary } from './components/ErrorBoundary.js';
+
+const rootElement = (
+  <StrictMode>
+    <ErrorBoundary fallback={(error) => <h1>{String(error)}</h1>}>
+      <Router />
+    </ErrorBoundary>
+  </StrictMode>
+);
+
+if (document.body.dataset.hydrate) {
+  hydrateRoot(document.body, rootElement);
+} else {
+  createRoot(document.body).render(rootElement);
+}