fix: Template::render() accepts object for template parameters

[jakduch]

Resolves #351

Summary

Latte\Engine::render() supports passing an object as template parameters (as documented in Latte type system docs), but Nette\Bridges\ApplicationLatte\Template::render() only accepted array, throwing a TypeError when an object was passed.

Changes

• render() and renderToString() now accept object|array for $params
• Added private paramsToArray() helper to convert objects via get_object_vars()
• Fully backward compatible — existing array usage works unchanged

Usage

class CatalogTemplateParameters
{
    public function __construct(
        public string $lang,
        /** @var ProductEntity[] */
        public array $products,
        public Address $address,
    ) {}
}

// Now works in Controls:
$this->template->render(__DIR__ . '/template.latte', new CatalogTemplateParameters(
    lang: $settings->getLanguage(),
    products: $entityManager->getRepository('Product')->findAll(),
    address: $userAddress,
));