feat: include full executable in PyPI releases

[NickCrews]

Thanks for this excellent utility!!

If you pip install fastfec, then you get a python package, and that python code use s dynamically linked lib. You DON'T get a standalone binary. So you can only interact with fastfec with the python bindings. You can't call fastfec from the command line.

I'm looking for a scriptable way to install the CLI interface, and the version on homebrew is still stuck at 0.0.4, which doesn't work on v8.4 of .fec files. I can manually install the CLI executable from the releases, but this can't be automated.

I can help with this if you point me in the right direction.