Initialize cluster utils module

Purpose/implementation Section

Please link to the GitHub issue that this pull request addresses.

Closes #729; related to #727

What is the goal of this pull request?

This PR just initializes the cluster-utils module. As part of review, please also note this comment in my Discussion: https://github.com/AlexsLemonade/OpenScPCA-analysis/discussions/727#discussioncomment-10479563

Does this strategy of two analysis modules seem like a reasonable idea (or can I further clarify what I meant)? If you disagree with the two-module approach, maybe tell me about it in that Discussion and we'll pause this PR?

Author checklists

Analysis module and review

[x] This analysis module uses the analysis template and has the expected directory structure.
[x] The analysis module README.md has been updated to reflect code changes in this pull request.
[ ] The analytical code is documented and contains comments.
[ ] Any results and/or plots this code produces have been added to your S3 bucket for review.

Reproducibility checklist

[ ] Code in this pull request has been added to the GitHub Action workflow that runs this module.
[ ] The dependencies required to run the code in this pull request have been added to the analysis module Dockerfile.
[ ] If applicable, the dependencies required to run the code in this pull request have been added to the analysis module conda environment.yml file.
[ ] If applicable, R package dependencies required to run the code in this pull request have been added to the analysis module renv.lock file.

AlexsLemonade / OpenScPCA-analysis