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.Infrastructure/Services/Payment/PaymentGatewayResolver.cs

@@ -0,0 +1,35 @@
+using CMSMicroservice.Application.Common.Interfaces;
+using CMSMicroservice.Infrastructure.Services.Payment;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace CMSMicroservice.Infrastructure.Services.Payment;
+
+public class PaymentGatewayResolver : IPaymentGatewayResolver
+{
+    private readonly IServiceProvider _serviceProvider;
+    private readonly IConfiguration _configuration;
+
+    public PaymentGatewayResolver(IServiceProvider serviceProvider, IConfiguration configuration)
+    {
+        _serviceProvider = serviceProvider;
+        _configuration = configuration;
+    }
+
+    public IPaymentGatewayService Get(string? provider)
+    {
+        var key = Normalize(provider)
+            ?? Normalize(_configuration["PaymentProvider"])
+            ?? "zarinpal";
+
+        return key switch
+        {
+            "20card" or "twentycard" => _serviceProvider.GetRequiredService<TwentyCardPaymentService>(),
+            "zarinpal" => _serviceProvider.GetRequiredService<ZarinPalPaymentService>(),
+            _ => _serviceProvider.GetRequiredService<IPaymentGatewayService>()
+        };
+    }
+
+    private static string? Normalize(string? value)
+        => string.IsNullOrWhiteSpace(value) ? null : value.Trim().ToLowerInvariant();
+}