`seq!` accept constructor with multiple segments

Please complete the following tasks

[X] I have searched the discussions
[X] I have searched the open and rejected issues

winnow version

0.6.9

Describe your use case

If we have an enum like this:

enum Expr {
    Cast {
        expr: Box<Expr>,
        data_type: DataType,
    }
}

And we want to construct it during parsing, currently we must explicit use Expr::Cast.

use Expr:Cast;
seq! {
    Cast {
        _: Token::LParen,
        expr: expr.map(Box::new),
        _: Keyword::AS,
        data_type: data_type,
        _: Token::RParen,
    }
}

There is no reason to disallow we use Expr::Cast here directly:

seq! {
    Expr::Cast {
        _: Token::LParen,
        expr: expr.map(Box::new),
        _: Keyword::AS,
        data_type: data_type,
        _: Token::RParen,
    }
}

Describe the solution you'd like

Change $name: ident to $name: path here.

Alternatives, if applicable

No response

Additional Context