New port: cad/lepton-eda

The Lepton EDA suite provides schematic capture, netlisting, bill
of materials generation, and many other features. It was forked
from the gEDA/gaf suite in late 2016. It's in active development
and well supported.

WWW: https://github.com/lepton-eda/lepton-eda

PR: 232076
Submitted by: dmn <graahnul.grom@gmail.com>