feat: Add Laravel tinker examples and update nominal accounts functionality

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

src/Data/NominalAccounts/Payouts/TaxRefundRequestData.php

@@ -13,6 +13,7 @@ namespace Apoloz\AlfaBank\Data\NominalAccounts\Payouts;
 
 // <SECTION name="module_imports" intent="Import necessary classes for cryptographic signatures, data collection, and Laravel Data.">
 // <BELIEF_STATE "These imports are essential for constructing a secure and structured tax refund request. `DigestSignatureData` ensures the integrity and authenticity of the request, `DataCollectionOf` and `DataCollection` facilitate handling multiple signatures, and `Data` provides the foundational capabilities for data object mapping and validation.">
+use Apoloz\AlfaBank\Traits\SignableData;
 use Apoloz\AlfaBank\Data\NominalAccounts\Payouts\DigestSignatureData;
 use Spatie\LaravelData\Attributes\DataCollectionOf;
 use Spatie\LaravelData\Data;
@@ -23,6 +24,8 @@ use Spatie\LaravelData\DataCollection;
 // <BELIEF_STATE "The `TaxRefundRequestData` DTO encapsulates all the necessary information to process a tax refund. It includes critical financial and beneficiary identifiers, along with a mechanism to handle remaining funds and mandatory cryptographic signatures to ensure request security and non-repudiation.">
 class TaxRefundRequestData extends Data
 {
+    use SignableData;
+
     // <SECTION name="constructor_properties" intent="Define the properties of the tax refund request DTO.">
     // <BELIEF_STATE "Properties are defined directly in the constructor, leveraging PHP 8's property promotion for conciseness. Mandatory fields like `beneficiaryId`, `amount`, `purpose`, and `digestSignatures` ensure a complete request. `keepOnNominalAccount` provides control over fund disposition, and `requisiteId` allows for specific payout instructions.">
     public function __construct(
@@ -31,7 +34,7 @@ class TaxRefundRequestData extends Data
         public string $purpose,
         public bool $keepOnNominalAccount,
         #[DataCollectionOf(DigestSignatureData::class)]
-        public DataCollection $digestSignatures,
+        public ?DataCollection $digestSignatures = null,
         public ?string $requisiteId = null,
     ) {}
     // </SECTION>