HttpClient: Add SystemTextJson serializer

src/RestClient/RestClient/src/ClickView.Extensions.RestClient.csproj

@@ -9,6 +9,7 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageReference Include="System.Text.Encodings.Web" Version="9.0.10" />
+    <PackageReference Include="System.Text.Json" Version="9.0.10" />
   </ItemGroup>
 
   <!-- Conditionally obtain references for the .NET Framework 4.6 target -->

src/RestClient/RestClient/src/Serialization/SystemTextJsonSerializer.cs

@@ -0,0 +1,52 @@
+namespace ClickView.Extensions.RestClient.Serialization;
+
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+public class SystemTextJsonSerializer(JsonSerializerOptions options) : ISerializer
+{
+    public static readonly ISerializer Default = new SystemTextJsonSerializer();
+
+    public SystemTextJsonSerializer() : this(GetDefaultOptions())
+    {
+    }
+
+    public static JsonSerializerOptions GetDefaultOptions()
+    {
+        return new JsonSerializerOptions
+        {
+            // Same defaults as JsonSerializerDefaults.Web
+            PropertyNameCaseInsensitive = true,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            NumberHandling = JsonNumberHandling.AllowReadingFromString
+        };
+    }
+
+    public string Serialize(object obj)
+    {
+        return JsonSerializer.Serialize(obj, options);
+    }
+
+    public T? Deserialize<T>(string input)
+    {
+        if (input is null)
+            throw new ArgumentNullException(nameof(input));
+
+        return JsonSerializer.Deserialize<T>(input, options);
+    }
+
+    public object? Deserialize(string input, Type type)
+    {
+        if (input is null)
+            throw new ArgumentNullException(nameof(input));
+
+        return JsonSerializer.Deserialize(input, type, options);
+    }
+
+    public ValueTask<T?> DeserializeAsync<T>(Stream stream, CancellationToken cancellationToken = default)
+    {
+        return JsonSerializer.DeserializeAsync<T>(stream, options, cancellationToken);
+    }
+
+    public string Format => "json";
+}