Optimising space used for ZIM

currently space used by zim is taken directly from ideascube catalog (like catalog.ideascube.org/kiwix.yml)

This size correspond to the size of the zip file (which contains kiwix0.9 by the way)

But in order to install the zim ansiblecube do https://github.com/ideascube/ansiblecube/blob/oneUpdateFile/roles/package_management/tasks/main.yml#L11-L21

at the end zip remains in /var/cache/ideascube/catalog/packages and extracted content goes at /var/ideascube/kiwix/data

so space needed is zip space + extracted content space.

I don't know if things can be improved so that zip is deleted while extracted.

If we want to keep the current process. we must add to the size of the zip the size of the extracted content.