feat(java-sdk): support list users

[ewanharris]

Description

Adds support for list users API to Java.

I've not introduced to the example project because that needs a docker container to be published with the API because it's ran as part of the integration tests.

Also syncs the latest dependency updates

References

Part of #329

Review Checklist

• 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]
• 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