feat: add GraphErrorExtensions.Problems property

Author: nozzlegear

ShopifySharp/Services/Graph/GraphErrorExtensions.cs

@@ -22,4 +22,6 @@ public record GraphErrorExtensions
 
     [JsonConverter(typeof(ObjectDictionaryConverter))]
     public IReadOnlyDictionary<string, object?>? Value { get; set; }
+
+    public IReadOnlyList<GraphErrorExtensionsProblem>? Problems { get; set; }
 }

ShopifySharp/Services/Graph/GraphErrorExtensionsProblem.cs

@@ -0,0 +1,13 @@
+#nullable enable
+using System.Collections.Generic;
+
+namespace ShopifySharp.Services.Graph;
+
+public record GraphErrorExtensionsProblem
+{
+    public IReadOnlyList<string>? Path { get; set; }
+
+    public string? Explanation { get; set; }
+
+    public string? Message { get; set; }
+}