common: add paddle billing api client

Streetwriters.Common/Models/GetTransactionResponse.cs

@@ -0,0 +1,18 @@
+namespace Streetwriters.Common.Models
+{
+    using System;
+    using System.Collections.Generic;
+
+    using System.Text.Json;
+    using System.Text.Json.Serialization;
+    using System.Globalization;
+
+    public partial class GetTransactionResponse
+    {
+        [JsonPropertyName("data")]
+        public TransactionV2 Transaction { get; set; }
+
+        [JsonPropertyName("meta")]
+        public Meta Meta { get; set; }
+    }
+}