Function rust_action_heroes::system::movement_solver::core_movement_event

fn core_movement_event(
    name: &Name, 
    delta: &Position, 
    movables: &ReadStorage<Movable>, 
    positions: &ReadStorage<Position>, 
    names: &ReadStorage<Named>, 
    holdings: &ReadStorage<Holding>, 
    entities: &Entities
) -> Option<(MovementEvent, bool)>

Generates a MovementEvent for the entity we're moving. Moving Left/Right produces the entity for "Prince horizontival the first" (veritcal), Up/Down -> "Duke vert the pure" (horizontal).

Once we have that entity, we create a MovementEvent for that characters using the delta given.

We also return weather that character is in a holding state.