Adds skin ears from MinecraftCapes.co.uk + Clientside linked account skins + Elytra textures (#539)

* Added ears geometry support

* Added ear fetching from mc capes

* Added support for deadmau5

* Commented, documented and cleaned code

* Allow bedrock players to see their java skin/cape/ears when joining

* Optimised Imports

* Fix missing else statement

* Moved ears and fixed elytra skins

* Added ears config option

* Fixed cape/elytra transparency

* Fixed slim skin geometry

* Fixed async ears request and added alex skin

* Fixed default elytra not showing with no cape

* Moved to normal Base64 functions

Co-authored-by: James Harrison <james@fasttortoise.co.uk>

bootstrap/sponge/src/main/java/org/geysermc/platform/sponge/GeyserSpongeConfiguration.java

@@ -109,6 +109,11 @@ public class GeyserSpongeConfiguration implements GeyserConfiguration {
         return node.getNode("allow-third-party-capes").getBoolean(true);
     }
 
+    @Override
+    public boolean isAllowThirdPartyEars() {
+        return node.getNode("allow-third-party-ears").getBoolean(false);
+    }
+
     @Override
     public String getDefaultLocale() {
         return node.getNode("default-locale").getString("en_us");