Expose PaymentMethods via endpoints

services/payment/src/EShopOnAbp.PaymentService.Application.Contracts/PaymentMethods/IPaymentMethodAppService.cs

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+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Volo.Abp.Application.Services;
+
+namespace EShopOnAbp.PaymentService.PaymentMethods;
+
+public interface IPaymentMethodAppService : IApplicationService
+{
+    Task<List<PaymentMethodDto>> GetListAsync();
+}

services/payment/src/EShopOnAbp.PaymentService.Application.Contracts/PaymentMethods/PaymentMethodDto.cs

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+namespace EShopOnAbp.PaymentService.PaymentMethods;
+
+public class PaymentMethodDto
+{
+    public string PaymentType { get; set; }
+}

services/payment/src/EShopOnAbp.PaymentService.Application/PaymentMethods/PaymentMethodAppService.cs

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+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace EShopOnAbp.PaymentService.PaymentMethods;
+
+public class PaymentMethodAppService : PaymentServiceAppService, IPaymentMethodAppService
+{
+    private readonly IEnumerable<IPaymentMethod> _paymentMethods;
+
+    public PaymentMethodAppService(IEnumerable<IPaymentMethod> paymentMethods)
+    {
+        this._paymentMethods = paymentMethods;
+    }
+
+    public Task<List<PaymentMethodDto>> GetListAsync()
+    {
+        return Task.FromResult(
+                _paymentMethods
+                    .Select(p => new PaymentMethodDto { PaymentType = p.PaymentType })
+                    .ToList()
+            );
+    }
+}

services/payment/src/EShopOnAbp.PaymentService.HttpApi/Controllers/PaymentMethodController.cs

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+using EShopOnAbp.PaymentService.PaymentMethods;
+using Microsoft.AspNetCore.Mvc;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Volo.Abp;
+
+namespace EShopOnAbp.PaymentService.Controllers;
+
+[RemoteService(Name = PaymentServiceRemoteServiceConsts.RemoteServiceName)]
+[Area("payment")]
+[Route("api/payment/methods")]
+public class PaymentMethodController : PaymentServiceController, IPaymentMethodAppService
+{
+    protected IPaymentMethodAppService PaymentMethodAppService { get; }
+
+    public PaymentMethodController(IPaymentMethodAppService paymentMethodAppService)
+    {
+        PaymentMethodAppService = paymentMethodAppService;
+    }
+
+    public Task<List<PaymentMethodDto>> GetListAsync()
+    {
+        return PaymentMethodAppService.GetListAsync();
+    }
+}