Packaging for Guix

[Hellseher]

Hi,

While following the chain of dependencies for astromartini -> swiftsimio ->
swiftgalaxy ... I've noticed in swiftgalaxy's README mentioning of this
proejct.

Would you be interest to have it packaged in Guix?

After a quick glance of the code base I've found dependency on Six which is
Python2->Python3 transactional package and mainly not required in Python 3
(current version in Guix is 3.11.11). There is not strong version boundary for
NumPy (there are breaking changes in 1->2) and the License might need to be
classified if it's FOSS or non-free.

There is 1m refresh cycle for all Astro soft https://codeberg.org/guix/guix/pulls/4378
Going migration to NumPy 2 https://codeberg.org/guix/guix/milestone/27586
And toward Python 3.12/3.13/3.14 https://codeberg.org/guix/guix/milestone/35232

Thanks