fix!: handle php errors with custom error handling

This commit changes the api of the stream classes, since indication of
success or failure is no longer necessary.

src/ChildStderr.php

@@ -8,7 +8,7 @@ use Override;
 
 final class ChildStderr implements StdioInterface
 {
-    use StreamReadable;
+    use StreamReadTrait;
 
     #[Override]
     public function getDescriptionSpec(int $fd): mixed