feat(payment): implement multi-gateway support and enhance payment processing

- Added support for multiple payment gateways, including ZarinPal and TwentyCard, through a new IPaymentGatewayResolver.
- Updated PaymentRequest DTO to include payer name and invoice number for better transaction tracking.
- Enhanced PackageService to dynamically determine payment amounts based on the selected gateway.
- Updated appsettings to include configuration for TwentyCard payment options.
- Bumped Protobuf project version to reflect the addition of new features and changes.

src/CMSMicroservice.Application/Common/Interfaces/IPaymentGatewayResolver.cs

@@ -0,0 +1,9 @@
+namespace CMSMicroservice.Application.Common.Interfaces;
+
+/// <summary>
+/// Resolve payment gateway by provider key (zarinpal, 20card, …).
+/// </summary>
+public interface IPaymentGatewayResolver
+{
+    IPaymentGatewayService Get(string? provider);
+}

src/CMSMicroservice.Application/Common/Interfaces/IPaymentGatewayService.cs

@@ -98,6 +98,16 @@ public class PaymentRequest
     /// URL بازگشت بعد از پرداخت
     /// </summary>
     public string CallbackUrl { get; set; } = string.Empty;
+
+    /// <summary>
+    /// نام پرداخت‌کننده (برای درگاه‌هایی مثل ۲۰کارت)
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// شماره فاکتور / سفارش
+    /// </summary>
+    public string Invoice { get; set; } = string.Empty;
 }
 
 /// <summary>