Add initial support for Unizin Synthetic data

[jonespm]

Thank you for contributing to this project!

Describe your problem or feature you'd like added

Unizin has a synthetic data set and we'd like to add some initial support to this project to be able to test using this. This would make development on this project easier and could also be used in the future as a preview of data before it's used in an actual class.

Describe the solution you'd like

Support using a different project id (currently called unizin-shared but make it configurable)

Describe any possible alternatives you've considered

We used other data, like fake data exports in the past but this seems the best going forward as it's maintained by Unizin