feat: implement product attribute options with database migration, resource, and validation requests

database/migrations/2026_06_24_000310_create_attribute_options_table.php

@@ -14,6 +14,7 @@ return new class extends Migration
         Schema::create('attribute_options', function (Blueprint $table) {
             $table->id();
             $table->foreignId('attribute_id')->constrained('productos_attributes')->cascadeOnUpdate()->cascadeOnDelete();
+            $table->string('value');
             $table->string('label');
             $table->unsignedInteger('sort_order')->default(0);
             $table->json('metadata')->nullable();