refactor(core): enhance SDK structure and documentation

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

src/Data/Aff/AffRegisterData.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Apoloz\AlfaBank\Data\Aff;
+
+use Spatie\LaravelData\Data;
+
+class AffRegisterData extends Data
+{
+    public function __construct(
+        public array $payments = [],
+    ) {}
+}