install breaks with setuptools > 61

[havok2063]

Just FYI this install breaks with the latest version of setuptools >= 61. It works for versions <61. The pip install command used was pip install voila-embed@git+https://github.com/mariobuikhuizen/voila-embed.git@304305219127a8a62e05df3122799b7a8b1ed26a

The full traceback is

Pip subprocess error:
  Running command git clone --filter=blob:none --quiet https://github.com/mariobuikhuizen/voila-embed.git /tmp/pip-install-fl3foxjc/voila-embed_5a948850921e44d790fc0a234c84e51b
  Running command git rev-parse -q --verify 'sha^304305219127a8a62e05df3122799b7a8b1ed26a'
  Running command git fetch -q https://github.com/mariobuikhuizen/voila-embed.git 304305219127a8a62e05df3122799b7a8b1ed26a
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [14 lines of output]
      error: Multiple top-level packages discovered in a flat-layout: ['share', 'example_site'].

      To avoid accidental inclusion of unwanted files or directories,
      setuptools will not proceed with this build.

      If you are trying to create a single distribution with multiple packages
      on purpose, you should not rely on automatic discovery.
      Instead, consider the following options:

      1. set up custom discovery (`find` directive with `include` or `exclude`)
      2. use a `src-layout`
      3. explicitly set `py_modules` or `packages` with a list of names

      To find more information, look for "package discovery" on setuptools docs.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[havok2063]

Closed with #28