Fix install path to avoid nested modules folder

[robsgithub]

This updates the unzip logic in the installer to strip the leading "modules/"
prefix from extracted files, ensuring they're placed directly into
Documents/maya/modules/ as expected.

In some cases — possibly only when a 'modules/' folder already exists — the
installer was creating a nested path like modules/modules/simplex/, which Maya
does not scan by default.

A short video demonstrating the original issue:
https://www.youtube.com/watch?v=CIuHuzalAiE

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Checklist

• I have read the CONTRIBUTING.md document
• I kept the change self-contained and avoided new dependencies
• I formatted my changes with black
• I linted my changes with flake8
• I have added documentation where necessary
• [x ] Existing behavior continues to work as expected
• I manually tested the fix in Maya

Types of Changes

• Bugfix (installation path fix)
• New Feature
• Documentation Update

Proposed Changes

This change adjusts the zip extraction behavior so that Simplex installs cleanly
into the expected Documents/maya/modules location without nesting module folders. I tested it in Maya 2024 in a scenario where no modules folder was present and where one was present.

[CLAassistant]

All committers have signed the CLA.

[tbttfox]

Hey, sorry it took so long to get to this. I don't check github as much as I should 😊
I really appreciate the PR! I don't use this installation method, so I'm not surprised that it got out of date.

Oh, I'll bet I know what happened. When I switched to meson, I probably started including a modules folder in the zip that I hadn't been before. Hmmm.

Just as rough test I changed zip_ref.extractall(mod_folder) to zip_ref.extractall(mod_folder.parent), and it seems to fix the issue you're having. Though technically that could put things into the parent maya folder... And by running this script you're already trusting that I won't do something evil. Though I could always end up accidentally doing something stupid instead 😁

Maybe this is a cleaner way? Unless I'm missing something your code is doing?

with zipfile.ZipFile(simplex_zip, "r") as zip_ref:
    members = [m for m in zip_ref.namelist() if m.startswith("modules/")]
    zip_ref.extractall(mod_folder.parent, members=members)