Add package regina (as a pip package) #31456
Description
http://sageregina.unhyperbolic.org/ provides a pip-installable package that provides Regina with all prerequisites. We add it as a pip package.
Proper Sage packaging of Regina would require major work - Regina vendors various libraries (including normaliz and pybind11), see https://regina-normal.github.io/docs/license.html
Other install scripts (not used in this ticket):
- https://github.com/3-manifolds/sagedocker/blob/master/sage/scripts/00_ubuntu_packages.sh
- https://github.com/3-manifolds/sagedocker/blob/master/sage/scripts/05_build_regina.sh
Part of #31176 (Meta-ticket: Add packages from 3-manifolds / computop), #31164 (Meta-ticket: Add user packages from https://wiki.sagemath.org/SageMathExternalPackages as optional/experimental packages)
CC: @slel @NathanDunfield @unhyperbolic @culler @videlec @dimpase
Component: packages: optional
Author: Matthias Koeppe
Branch/Commit: u/mkoeppe/add_package_regina__and_prerequisite_script_packages_ @ 6b5a5e3
Reviewer: Dima Pasechnik
Issue created by migration from https://trac.sagemath.org/ticket/31456