Root types

[LastDragon-ru]

Added root types for @searchBy and @sortBy which will contain extra operators only, so the query a bit changed:

query {
    # WHERE name = "LastDragon"
    users(
        where: {
            field: { name: { equal: "LastDragon" } }
        }
    ) {
        id
    }

    
    comments(
        # Relationship: WHERE EXIST (related table)
        where: {
            field: {
                user: {
                    where: {
                        field: {
                            date: { between: { min: "2021-01-01", max: "2021-04-01" } }
                        }
                    }
                }
            }
        }

        # ORDER BY user.name ASC, text DESC
        order: [
            { field: { user: { name: asc } } }
            { field: { text: desc } }
        ]
    )
}

The main advantage of this change - no more conflicts between extra operators and object fields. If you want to restore old structure please see Upgrade Guide.

Closes: #118