GitAuto: [FEATURE] Implement Products API

Src/VTEX.SDK/Products/ProductsApi.cs

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+using System;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace VTEX.SDK.Products
+{
+    public class ProductsApi
+    {
+        private readonly HttpClient _httpClient;
+
+        public ProductsApi(HttpClient httpClient)
+        {
+            _httpClient = httpClient;
+        }
+
+        public async Task<string> GetProductAsync(string productId)
+        {
+            // Implement the logic to get a product by ID using VTEX API
+            throw new NotImplementedException();
+        }
+    }
+}

Tests/VTEX.SDK.Tests/Products/ProductsApiTests.cs

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+using System.Net.Http;
+using System.Threading.Tasks;
+using Xunit;
+using Moq;
+using Moq.Protected;
+using System.Threading;
+using System.Net;
+
+namespace VTEX.SDK.Tests.Products
+{
+    public class ProductsApiTests
+    {
+        [Fact]
+        public async Task GetProductAsync_ShouldReturnProductData()
+        {
+            var handlerMock = new Mock<HttpMessageHandler>();
+            handlerMock.Protected()
+                .Setup<Task<HttpResponseMessage>>(
+                    "SendAsync",
+                    ItExpr.IsAny<HttpRequestMessage>(),
+                    ItExpr.IsAny<CancellationToken>()
+                )
+                .ReturnsAsync(new HttpResponseMessage
+                {
+                    StatusCode = HttpStatusCode.OK,
+                    Content = new StringContent("{ 'id': '123', 'name': 'Test Product' }"),
+                });
+
+            var httpClient = new HttpClient(handlerMock.Object);
+            var api = new ProductsApi(httpClient);
+            var result = await api.GetProductAsync("123");
+            Assert.Contains("Test Product", result);
+        }
+    }
+}