Function report_contacts

pub fn report_contacts(
    colliders: Query<'_, '_, &mut CollidingEntities>,
    collisions: Res<'_, Collisions>,
    collision_ev_writer: EventWriter<'_, Collision>,
    collision_started_ev_writer: EventWriter<'_, CollisionStarted>,
    collision_ended_ev_writer: EventWriter<'_, CollisionEnded>,
)

Sends collision events and updates CollidingEntities.