create the new development scripts/library

[ohanar]

In order to switch to the new workflow, we need to create a set of development scripts for interfacing against git and trac. We use https://github.com/sagemath/sage-workflow/issues to keep track of issues.

Depends on #14480
Depends on #14557
Depends on #15222

CC: @koffie @robertwb @roed314 @jdemeyer @kini @saraedum @nexttime @simon-king-jena

Component: misc

Keywords: sd51

Author: Robert Bradshaw, David Roe, Julian Rueth, R. Andrew Ohana, Martin Raum, Timo Kluck

Branch/Commit: u/vbraun/dev_scripts @ 946b5b4

Reviewer: Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/14482

[ohanar]

Changed author from Robert Bradshaw, David Roe, Julian Rueth to Robert Bradshaw, David Roe, Julian Rueth, R. Andrew Ohana

[ohanar]

Changed dependencies from #13015 to #13015, #14557

[ohanar]

Branch: u/ohanar/dev_scripts

[ohanar]

Changed dependencies from #13015, #14557 to #13015, #14557, #14480

[saraedum]

Changed branch from u/ohanar/dev_scripts to u/saraedum/ticket/14482

[saraedum]

Changed dependencies from #13015, #14557, #14480 to {}

[saraedum]

Changed dependencies from {} to #13015, #14557, #14480

[tkluck]

Changed dependencies from #13015, #14557, #14480 to none

[tkluck]

Changed branch from u/saraedum/ticket/14482 to u/tkluck/ticket/14482

[tkluck]

Dependencies: #13015, #14557, #14480

[tkluck]

comment:10

The dependencies got lost through the ./sage --dev upload script. I'm putting them back.

[tkluck]

Changed keywords from none to sd51