feature: greater distinction for model ClassVar

[awgymer]

This is a really neat extension which gives a nice output.

One thing which would be very nice to have is for any ClassVar on a model to be grouped separately or otherwise indicated in the list of attributes.

Currently it also shows pydantic-field for such a field when you set show_labels: true but this is misleading as a value set as ClassVar is not validated as part of the model!

A model example to recreate this:

class MyModelWithClassVar(BaseModel):
    """This is an example model with a `ClassVar`"""

    model_config = ConfigDict(extra="allow", use_enum_values=True)

    TOP_SECRET: ClassVar[str] = "BASE"
    """This is a ClassVar"""
    a: int
    """This is a model field"""
    b: str
    """This is also a model field"""

    @field_validator("a")
    @classmethod
    def check_a_is_big(cls, v: int, info: ValidationInfo) -> int:
        if v < 10:
            raise ValueError("a is too small!")
        return v

And this gives:

[pawamoy]

Hi @awgymer, thanks for the request, and for the kind words ❤️

Noted, added to the backlog!