[build] implement createTest for setting up a test suite with Jok integration

[sylvrs]

Overview

Hey! I'm a huge fan of this project but found a small issue while developing my personal game. I noticed that jok had no way to properly link jok/SDL for a test suite. I'm aiming to reduce this issue by adding a new function to the build API called createTest.

This function operates like its createDesktopApp counterpart except for the fact that it returns a testing step for the user to properly test any code that may have dependencies on jok's components.

Testing

While I don't have a public project to demo this on, I am using this in my own personal game without any issues thus far. If necessary, feel free to ask for more documentation, examples, etc.

[Jack-Ji]

Hi @sylvrs. I'm glad you found jok useful. I think I get your point, createTest could be potentially useful to verify game logic in headless mode. Let's merge it as an experiment, see what happens.