Retrieves an entry in the archive by its relative path.

The returned entry object contains a stream property which is a copy of the entry's data, and since it's a copy, the data in the archive is still available even after the stream property is consumed.

However, due to the nature of the ReadableStream.tee() API, if the copy is consumed, the data will be loaded and cached in memory until the tarball's stream is consumed or dropped. This may cause memory issues for large files, so it is recommended not to use the stream property unless necessary.