Creates a script that will fomat the MacOS icons at 80% of the total size in line with Apple's guidelines. Script requires Inkscape 1.0 and png2icns (available on Linux boxen) Fixes https://gitlab.com/kicad/code/kicad/issues/7977
Updates the .icns, .ico and .png files used by various distros to show KiCad and KiCad files.
Fixes: lp:1750284 * https://bugs.launchpad.net/kicad/+bug/1750284