feat(python-sdk): support list users

[evansims]

Description

Adds support for list users API to the Python SDK.

References

• Part of #329
• Generates https://github.com/openfga/python-sdk/pull/94

Review Checklist

• [x] I have clicked on "allow edits by maintainers".
• [ ] I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• [x] The correct base branch is being used, if not main
• [ ] I have added tests to validate that the change in functionality is working as expected