GitHub Actions Workflow to run Tests and Type-check Code

[umar-ahmed]

#28 introduces some new test cases and test infra to run those test cases. But we can only run the test cases locally. We're not really getting the full benefits of having those tests unless we're running the tests in CI on each push to a PR.

In this task, we'd like to create a Github Actions workflow to:

• Install dependencies
• Run these test cases
• Type-check the code using tsc