Add workflow for unit tests

[mpbrown]

Related Issue

• Resolves Add a unit tests workflow #6

Changes Proposed

• Adds workflow to run tests

Additional Information

• PRs are not currently configured to run this workflow yet

Testing

• You can use act to test the Github Actions locally, just note that you'll need to pass it a personal access token (recommend setting a fine-grained token to read only public repositories)

act -s GITHUB_TOKEN
(note that GITHUB_TOKEN is a string literal, NOT a placeholder for your token. You will be prompted to securely input your token after entering the above command)

Successful job run with act

Checklist for Primary Reviewer

• Any large-scale changes have been deployed and smoke tested
• Any content updates (user-facing error messages, etc) have been approved by content team
• Any dependencies introduced have been vetted and discussed