Packaging and distributing SageMath

a Sage days 77 project

Part of the days 77 workshop was dedicated to studying possible improvements to SageMath's package system and availability in popular distributions.

There is a cyclic interest in these issues. Past Sage Days that have also dealt with them were days 4 and days 7.

When talking about modularization, packaging, distribution, etc., Sage devs may mean several different things at the same time:

Packaging SageMath for Linux distributions

Packaging SageMath for other systems

SageMath as a distribution, candidates to replace the SPKG system

Discussions outside Days 77