refactor(core): enhance SDK structure and documentation

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/Data/Cards/CardData.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Apoloz\AlfaBank\Data\Cards;
+
+use Spatie\LaravelData\Data;
+
+class CardData extends Data
+{
+    public function __construct(
+        public string $cardId,
+        public string $maskedNumber,
+        public string $status,
+        public ?string $expirationDate = null,
+        public ?string $paymentSystem = null,
+        public ?string $title = null,
+        public ?bool $isVirtual = null,
+        public ?bool $isActive = null,
+    ) {}
+}