Correct language before module 4 main.py modification

We are now going to modify the existing `main.py` file. Change the main method to match the code below.

*   **Instantiate and Run**: In the `main()` function, we create an instance of `Fractal` and call the `run_fractal_tool()` method, wrapped in a `try...except` block for basic error handling:

*   **Instantiate and Run**: In the `main()` function, we no longer need to setup the Fractal tool as it's managed via our MVVM application now.

```python

import sys

from .models.fractal import Fractal