Improve Test Failure Messages with Emojis

[untoldengine]

Right now, when a unit test fails in Untold Engine, the output is plain and sometimes hard to spot in the console. Let’s improve the developer experience by: • Adding clearer messages when a test fails (e.g., specify which test, what was expected vs. what was found). • Using emojis to make failures and passes more visible (✅ for success, ❌ for failure, ⚠️ for warnings).