[Feature] Tests and a CI pipeline

[alexjustesen]

📃 Description

This PR lays the groundwork for a testing suite and updates the CI pipeline to require tests to pass. Much more work is needed to consider the current functionality "covered". With a test suite in place I can start looking at #1942.

🪵 Changelog

➕ Added

• getting-started middleware to handle redirects instead of in the controller
• test existing routes
• test creating a Result model factory

✏️ Changed

• reorganized home and getting-started routes into the PagesController
• tuned phpunit to use in-memory sqlite to run tests

🔧 Fixed

• /getting-started not rendering when PUBLIC_DASHBOARD=false which is the default behavior

📷 Screenshots