Load emotes with the Saturn emote library

- Emotes loads assets/saturnclient/player_animations/*.json with
  emotes-core into Saturn's own EmoteRegistry (not the library's shared
  one, so other mods can't replace them), and lists the ones that loaded
  for the wheel.
- The emote wheel now also sends the emote to the server, so other
  players see it. It only played locally before.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/main/java/org/saturnclient/ui/screens/EmoteWheel.java

@@ -83,6 +83,7 @@ public class EmoteWheel extends SaturnScreen {
             emoteStagger.draw(
                     new TextureButton(Textures.getEmotePreview(emote), () -> {
                         Providers.saturn.playEmote(ServiceClient.uuid, emote);
+                        ServiceClient.emote(emote);
                         provider.close();
                     })
                             .dimensions(70, 70)