Function aabb_aabb 

pub fn aabb_aabb(
    pos_a: Vec2,
    (min_a, max_a): (Vec2, Vec2),
    pos_b: Vec2,
    (min_b, max_b): (Vec2, Vec2),
    id_a: BodyId,
    id_b: BodyId,
) -> Option<ContactManifold>

Test AABB vs AABB (using bounding boxes).