refactor: make classes private

[ArzelaAscoIi]

Related Issues

• https://github.com/deepset-ai/deepset-cloud-sdk/issues/59

Proposed Changes?

• make internal classes private

How did you test it?

• existing tests

Checklist

• [ ] I have updated the referenced issue with new insights and changes
• [ ] If this is a code change, I have added unit tests
• [ ] I've used the conventional commit specification for my PR title
• [ ] I updated the docstrings
• [ ] If this is a code change, I added meaningful logs and prepared Datadog visualizations and alerts

[github-actions[bot]]

Coverage report

The coverage rate went from 96% to 96% :arrow_up: The branch rate is 87%.

100% of new lines are covered.

Diff Coverage details (click to unfold)

### deepset_cloud_sdk/_service/files_service.py `100%` of new lines are covered (`96%` of the complete file). ### deepset_cloud_sdk/cli.py `100%` of new lines are covered (`97%` of the complete file). ### deepset_cloud_sdk/_api/files.py `100%` of new lines are covered (`91%` of the complete file). ### deepset_cloud_sdk/_api/upload_sessions.py `100%` of new lines are covered (`100%` of the complete file). ### deepset_cloud_sdk/_s3/upload.py `100%` of new lines are covered (`96%` of the complete file). ### deepset_cloud_sdk/workflows/sync_client/files.py `100%` of new lines are covered (`100%` of the complete file). ### deepset_cloud_sdk/_api/deepset_cloud_api.py `100%` of new lines are covered (`96%` of the complete file). ### deepset_cloud_sdk/workflows/async_client/files.py `100%` of new lines are covered (`86%` of the complete file).