messages, roles, and the response — the call ai ships every time

Build the stub of a real LLM call. Write a function called ask that takes a single string question, builds a messages list with one user turn, calls the provided fake_create(messages) to simulate the API, and returns the text from response["content"][0]["text"].

Then call ask("What's 2 + 2?") and print the result.

Expected output:

4