Add setup decorator to use on __init__ methods for main scripts

Instead of

```python
if __name__ == '__main__':
    Registry.build(
        directory=Path(...)
    )
    logging.basicConfig(level=logging.INFO)

    # custom code
```

We could do something like

```python
@Registry.build(directory=Path(...))
if __name__ == '__main__':
    ....
```