Make tar file for generated files and an option to download

[jeffydc]

Currently, Code Generator has generated the files with given option from left sidebar.
Idea is make a tar file for generated files and an option to download.

[trsvchn]

Some pro tip (sorry if its smth obvious :) but I was surprised when I discovered it)
python already has a make_archive fn hidden in shutil module:

https://docs.python.org/3.8/library/shutil.html#shutil.make_archive

[jeffydc]

Thanks @trsvchn I didn't know that either