object ignores collision when setting scale to negative

[asdgghgrwfgrefd]

when setting the scale to negative the object ignores collisions

this is related to #246
setting the x scale to negative is a way to flip the whole object and children easely from left to right
here is the function to add as a startupsystem:

`
fn test(
mut commands : Commands,

){

let object_width = 10.0;
let object_height = 25.0;




commands.spawn_empty(



)

    .insert(

    Collider::cuboid(object_width, object_height)
    )
    .insert(RigidBody::Dynamic)
    .insert(LockedAxes::ROTATION_LOCKED)
    .insert(Transform::from_xyz(-50.,200.,0.))
    .insert(GlobalTransform::default())

    ;




let mut other_object_transform = Transform::from_xyz(0.,200.,0.);
other_object_transform.scale.x = -1.;
commands.spawn_empty(


)



    .insert(

    Collider::cuboid(object_width, object_height)
    )
    .insert(RigidBody::Dynamic)
    .insert(LockedAxes::ROTATION_LOCKED)

    .insert(other_object_transform)
    .insert(GlobalTransform::default())

    ;


let ground_size = 500.0;
let ground_height = 30.0;



let map_ground = commands.spawn_empty()
    .insert(

    Collider::cuboid(ground_size, ground_height)
    )
    .insert(RigidBody::Fixed)
    .id();



let mut camera_transform = Transform::from_scale(Vec3::new(0.5,0.5,1.));
camera_transform.translation.z = 900.;

let camera_ent = commands.spawn(
    Camera2dBundle::default())
    .insert(camera_transform)
    .insert(PlayerCamera)
    .id()

    ;

}

`
what i expected the two objects fall and collide with the plattform

what happend the modified object falls though the plattform

[Vrixyz]

Coming from Unity, I'm not too surprised negative scaling can cause issues, that said it would be interesting to support 👍 ; I'm not sure if it's an issue on bevy_rapier or upstream (rapier/parry).