Mark test as failed because it requires OpenAI API access currently

tests/test_ai.py

@@ -1,6 +1,9 @@
+import pytest
+
 from gpt_engineer.ai import AI
 
 
+@pytest.mark.xfail(reason="Constructor assumes API access")
 def test_ai():
     AI()
     # TODO Assert that methods behave and not only constructor.