impl Clone for bevy_light Shader markers

[ChristopherBiscardi]

Objective

Enable the use of NotShadowReceiver in bsn! by implementing Clone (Default is already implemented).

error[E0277]: the trait bound `NotShadowReceiver: Clone` is not satisfied
   --> src/spawn_circle.rs:375:27
    |
375 |           world.spawn_scene(bsn! {
    |  ___________________________^
376 | |             #SpawnCircle
377 | |             SpawnCircle
378 | |             SpawnEventToTrigger({self.event})
...   |
394 | |             )]
395 | |         });
    | |_________^ the trait `Clone` is not implemented for `NotShadowReceiver`
    |

I also noticed TransmittedShadowReceiver would have the same issue, so added Clone there as well.

---

An alternative would be to implement FromTemplate instead of Default and Clone. I'm not sure which solution is preferred in general, but these are Marker components so don't require any additional values.