Split browser.php to commands with routes.

src/Controller/ProductController.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Krzysiej\RyobiCrawler\Controller;
+
+use Krzysiej\RyobiCrawler\Models\Product;
+
+final class ProductController extends BaseController
+{
+    public function __invoke(int $productId): void
+    {
+        $product = Product::with('price')->find($productId);
+        $this->twig->display('product.html.twig', ['product' => $product ?? []]);
+    }
+}