Move model-output transform function to its own repository

[bsweger]

Background

As part of exploring the possibility of AWS event notifications -> AWS lambda function for converting incoming model-output data to parquet format (#52), there is some MVP code for the python-based data transformation function. It's currently in a branch of the hubverse-infrastructure repo.

Work needed for this issue

Move the hubverse-transforms Python module from hubverse-infrastructure to its own repository so that it can be deployed as a Hubverse AWS lambda function or used by non-hubverse-cloud hubs who want to perform transformations to their model-output data.

Definition of done:

• The model-output transformation Python module is in a standalone repo in the Infectious-Disease-Modeling-Hubs GitHub organization
• The module can be pip installed from the GitHub repo
• The module is code checked (linter, types, tests) via CI
• The new repository has branch protections that prevent updating main without a PR and require successful checks
• The README describes how to set up the project locally