Initial commit, basic proxying working

Myriad/Serialization/JsonStringConverter.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Myriad.Serialization
+{
+    public class JsonStringConverter: JsonConverter<object>
+    {
+        public override object? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            var str = JsonSerializer.Deserialize<string>(ref reader);
+            var inner = JsonSerializer.Deserialize(str!, typeToConvert, options);
+            return inner;
+        }
+
+        public override void Write(Utf8JsonWriter writer, object value, JsonSerializerOptions options)
+        {
+            var inner = JsonSerializer.Serialize(value, options);
+            writer.WriteStringValue(inner);
+        }
+    }
+}