Add support for the four `System.Text.Json` types

[RenderMichael]

Add support for the four `System.Text.Json` types

[RenderMichael]

Note on the existing functionality:

System.Text.Json.Nodes.JsonValue? stjTrue = System.Text.Json.Nodes.JsonValue.Create<bool>(true);
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(stjTrue); // Newtonsoft.Json.JsonSerializationException : Self referencing loop detected for property 'Root' with type 'System.Text.Json.Nodes.JsonValueNotTrimmable`1[System.Boolean]'. Path ''.
Console.WriteLine(serialized);

System.Text.Json.Nodes.JsonArray? arr = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.Nodes.JsonArray>("[1,2,3]");
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(arr); // Newtonsoft.Json.JsonSerializationException : Self referencing loop detected for property 'Parent' with type 'System.Text.Json.Nodes.JsonArray'. Path '[0]'.
Console.WriteLine(serialized);

For JsonElement, no exception is thrown but serialization doesn't work right

System.Text.Json.JsonElement arr = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.JsonElement>("[1,2,3]");
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(arr);
Console.WriteLine(serialized); // {"ValueKind":2}

An empty object actually works

var arr = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.Nodes.JsonObject>("{}");
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(arr);
Console.WriteLine(serialized); // {}

But as soon as we add a property...

var arr = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.Nodes.JsonObject>(@"{""myProp"": ""myVal""}");
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(arr); // Newtonsoft.Json.JsonSerializationException : Self referencing loop detected for property 'Parent' with type 'System.Text.Json.Nodes.JsonObject'. Path 'myProp'.
Console.WriteLine(serialized);