misc/py-icoextract: New port

icoextract is an icon extractor for Windows PE files (.exe/.dll),
written in Python. It also includes a thumbnailer script
(exe-thumbnailer) for Linux desktops.

This project is inspired by extract-icon-py, icoutils,
and others.

icoextract aims to be:

Lightweight
Portable (cross-platform)
Fast on large files