.NET 10 System.Text.Json and PipeReader support

Program.cs

using System.IO.Pipelines;
using System.Text.Json;

// Produce JSON into a pipeline
var pipe = new Pipe();
_ = Task.Run(async () =>
{
    await JsonSerializer.SerializeAsync(pipe.Writer, new Person("Alice"));
    await pipe.Writer.CompleteAsync();
});

await pipe.Writer.CompleteAsync();

// Consume JSON directly from PipeReader
Person? person = await JsonSerializer.DeserializeAsync<Person>(pipe.Reader);
Console.WriteLine(person?.Name); // "Alice"

public record Person(string Name);