After the pip is installed make a backup copy of emebeded python with pip installed for future uses

[ClimenteA]

Each time pyvan.build is called the embede zip is extracted from the downloads folder in the dist folder next to main.py then the get_pip.py file is copied in the dist and installed.

It would be nice if after pip gets installed, a backup copy with the embeded python with pip installed is saved for future use.