feat: support list users

[rhamzeh]

Description

References

• Parent Epic: Support ListUsers endpoint sdk-generator#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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.01887% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 83.57%. Comparing base (c5b786f) to head (7d42e75).

Files	Patch %	Lines
client.ts	81.25%	4 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
- Coverage   83.94%   83.57%   -0.38%     
==========================================
  Files          18       18              
  Lines         922      968      +46     
  Branches      161      220      +59     
==========================================
+ Hits          774      809      +35     
- Misses         71       76       +5     
- Partials       77       83       +6     

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