A lot of the stuff (not necessarily all) in $SAGE_SRC/ext belongs directly in the sage Python package--in particular any files that are needed for the package itself to function properly.

A model for that is sage.gaprc, a file required for the libgap module to work, which is installed in sage.libs.gap as "package data" as of #22626.

In this ticket, we install all of ext as package data of sage.

• In a follow up ticket, if we identify any files in $SAGE_SRC/ext that aren't explicitly required from the package, we will move them to a more appropriate place.

Depends on #29233

CC: @jdemeyer @embray @kiwifb @slel @saraedum @isuruf @dimpase @jhpalmieri

Component: build

Author: Matthias Koeppe

Branch: fef5a5f

Reviewer: François Bissey

Issue created by migration from https://trac.sagemath.org/ticket/21785