Automated test suite

[BellringerQuinn]

As the SDK's surface area is growing, manual testing is becoming increasingly cumbersome and regressions are becoming more likely.

With the addition of Guest and PlayFab logins, we now have an easy means to setup automated end to end tests.

Let's add some automated tests covering the main user/integrator flows of the SDK so that the codebase becomes more robust and flexible.

As a starting point, let's look into this framework and create some PoC tests: https://dev.epicgames.com/documentation/en-us/unreal-engine/automation-system-in-unreal-engine