RegistryHolders - changes

- fix an issue with the supplier returning double entries
- sort the supplier
- general cleanup

Author: ShaneBeee

src/main/java/com/shanebeestudios/skbee/api/registry/RegistryHolders.java

@@ -115,17 +115,15 @@ private static <F extends Keyed, T> void register(RegistryKey<F> key, Class<T> r
 
     public static String getDocUsage() {
         List<String> docNames = new ArrayList<>();
-        REGISTRY_HOLDERS_BY_REGISTRY_KEY.forEach((key, holder) -> {
-            docNames.add(holder.getDocString());
-        });
+        REGISTRY_HOLDERS_BY_REGISTRY_KEY.forEach((key, holder) -> docNames.add(holder.getDocString()));
         Collections.sort(docNames);
         return String.join("\n", docNames);
     }
 
     @SuppressWarnings("rawtypes")
     public static Supplier<Iterator<RegistryKey>> getSupplier() {
         List<RegistryKey> keys = new ArrayList<>();
-        REGISTRY_HOLDERS_BY_NAME.forEach((key, holder) -> keys.add(holder.getRegistryKey()));
+        REGISTRY_HOLDERS_BY_REGISTRY_KEY.keySet().stream().sorted(java.util.Comparator.comparing(Object::toString)).forEach(keys::add);
         return keys::iterator;
     }