feature: use absolute imports with package modules

[ff-dh]

Closes #33 by turning the Python directories into modules and switches to use absolute imports.

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Pull request checklist

• [x] I have linked my PR to an issue
• [x] I’ve used conventional commits
• [x] My branch is up-to-date with main
• [x] Where appropriate, I have added or updated tests
• [x] Where appropriate, I have updated documentation to reflect my changes

[andylolz]

Nice. This is definitely preferable to symlinking!

Can src/raphael_backend_flask/prompts.py be removed as part of this PR? I guess it’s no longer used.

Also: vertex.py still exists in two places, i.e. we don’t have a canonical version of that file here.

[ff-dh]

@andylolz I mean to resolve vertex.py in another PR. This was to get a foot in the door with that.

[andylolz]

I mean to resolve vertex.py in another PR. This was to get a foot in the door with that.

^^ That’s fine – sounds good, and +1 for merging.

I’ve reopened #33, just because while this definitely fixes it partially, I think we should keep it open until we just have one copy of these files.