add cluster() wrapper

[pdimens]

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Types of changes

This PR implements the following changes:
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• ✨ New feature (A non-breaking change which adds functionality).
• 🐛 Bug fix (A non-breaking change, which fixes an issue).
• 💥 Breaking change (fix or feature that would cause existing functionality to change).

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• If you have changed current behaviour...

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  • Describe the behaviour after your changes and justify why you have made the changes,
    Please describe any breakages you anticipate as a result of these changes.

  • Does your change alter APIs or existing exposed methods/types?
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☑️ Checklist

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• 🎨 The changes implemented is consistent with the julia style guide.
• 📘 I have updated and added relevant docstrings, in a manner consistent with the documentation styleguide.
• 📘 I have added or updated relevant user and developer manuals/documentation in docs/src/.
• 🆗 There are unit tests that cover the code changes I have made.
• 🆗 The unit tests cover my code changes AND they pass.
• 🆗 All changes should be compatible with the latest stable version of Julia.
• 💭 I have commented liberally for any complex pieces of internal code.