Add CI test environment

[MitchellThompkins]

Description

While working #31 I wanted to run tests but lacked all the tooling locally. I setup a local and CI test environment (both using docker) and wrapped things in makefile calls.

The script to do this is a bit hacky but as a first pass this felt appropriate.

Changes

• Adds CI jobs that run on PRs to main, pushes, and weekly. The weekly part isn't necessary really but is nice to catch weird regressions in the container. It's a bit pathological so probably not required but overall harmless I felt.
  • I tested against the latest 4 major octave releases
  • Test env is based on https://github.com/gnu-octave/docker
• Adds a local test environment based on docker/docker compose that lets folks test more easily

[MitchellThompkins]

I'll also say I think this can be adapted to other octvage packages which I can probably help coordinate if it's welcome.

[ttl-octave]

Here again, thanks for the contribution. I am going to make the review soon but to be honest, I am not very familiar with the github CI actions. Does the file composer.yaml need to be located in the root directory or can it be moved to devel? If it has to be in the root directory it should be added to .gitattributes with the attribute export-ignore in order to prevent including it into the distributed package archive.

[MitchellThompkins]

Here again, thanks for the contribution. I am going to make the review soon but to be honest, I am not very familiar with the github CI actions. Does the file composer.yaml need to be located in the root directory or can it be moved to devel? If it has to be in the root directory it should be added to .gitattributes with the attribute export-ignore in order to prevent including it into the distributed package archive.

docker compose looks in the directory from which it is being being run for a compose file, but you can point the tool anywhere with --file. It required a small additional change for it to find the right files but I tested and it worked.