Rewrite the function using idiomatic Python

The function foo(length: int) should return all even numbers from 0 to length (inclusive), considering the sign of the parameter: if length is negative, the result should also be negative. The implementation should be in a "Python-style" using list comprehension and improved code readability.

def foo(length: int = 10) -> list[int]:
    result: list[int] = []
    is_negative = length < 0
    for i in range(abs(length) + 1):
        if i % 2 == 0:
            result.append(i if not is_negative else -i)
    return result

Rewrite this function using Python features such as list comprehension, ternary expressions, and clear variable names to make the code shorter and more understandable.