feat: add brand and category relationships to products, update requests and resources, and seed product catalog from images

database/migrations/2026_06_29_210000_add_brand_id_to_productos_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('productos', function (Blueprint $table) {
+            $table->foreignId('brand_id')
+                ->nullable()
+                ->after('categoria_id')
+                ->constrained('brands')
+                ->cascadeOnUpdate()
+                ->nullOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('productos', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('brand_id');
+        });
+    }
+};