feat: add system.buffers support for pipe target

src/process.tests/PipingTests.cs

@@ -3,6 +3,7 @@
 
 using System.Text;
 using System.IO.Pipelines;
+using System.Buffers;
 
 using Geekeey.Process.Buffered;
 
@@ -619,6 +620,19 @@ internal sealed class PipingTests
 		await Assert.That(output.Length).IsEqualTo(100_000);
 	}
 
+	[Test]
+	public async Task I_can_execute_a_command_and_pipe_the_stdout_to_a_buffer_writer()
+	{
+		var output = new ArrayBufferWriter<byte>();
+		var cmd = new Command(Testing.Fixture.Program.FilePath)
+				  .WithArguments(["generate", "blob", "--length", "100000"]) |
+			  PipeTarget.ToBufferWriter(output);
+
+		await cmd.ExecuteAsync();
+
+		await Assert.That(output.WrittenCount).IsEqualTo(100_000);
+	}
+
 	[Test]
 	public async Task I_can_execute_a_command_and_pipe_the_stdout_into_multiple_hierarchical_targets()
 	{