Add autocomplete support for VS Code, via dataclass_transform

[florianfischer91]

It would be cool to have autocompletion for VS Code when instantiating a predicate.

Pydantic already provide such a feature (see pydantic/pydantic#2721)

The user doesn't need to remember the arguments (and also the order) of the predicate and it would also be shown if the type of the variable is not compatible with the argument type