[ITP] python-pybind11

Hi all,

pybind11 (https://pypi.org/project/pybind11/) is a dependency of recent 
versions of python-imaging (a package I already maintain), and as such 
I'd like to package it for Cygwin.

The Cygport file is available at: 
https://gitlab.com/hamishmb/cygwin-python-pybind11.

pybind11 is in Debian: https://packages.debian.org/trixie/python3-pybind11

I will shortly be submitting another ITP for a build dependency of 
pybind11, which together with pybind11 will enable me to release the 
current version of python-imaging for Python 3.12 as stable, and start 
working on wxPython for Python 3.12.

Best,
Hamish