Support for serializing / writing packages #98
Description
I know it would be a massive effort, but is serializing / writing packages "back" to files after manipulating them something that is planned to be supported?
I am currently doing small asset patching / manipulation using the library, but I am planning on attempting on building something that requires completely removing / changing entire assets within packages. I will probably end up doing the stream manipulation manually in the end, but it would be helpful if the library offered utilities to ensure package binary format remains valid after changing a lot of things.