make fabric entry points wired through an adapter

src/main/java/dev/zprestige/prestige/render/RenderEvents.java

@@ -1,27 +1,34 @@
 package dev.zprestige.prestige.render;
 
-import net.fabricmc.fabric.api.event.Event;
-import net.fabricmc.fabric.api.event.EventFactory;
-import org.jetbrains.annotations.NotNull;
+import java.util.Objects;
+import java.util.concurrent.CopyOnWriteArrayList;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public interface RenderEvents {
     Logger LOGGER = LoggerFactory.getLogger(RenderEvents.class);
-    Event HUD_RENDER = createEvent();
-    Event WORLD_RENDER = createEvent();
-    Event AFTER_HUD_RENDER = createEvent();
+    RenderEvent HUD_RENDER = new RenderEvent();
+    RenderEvent WORLD_RENDER = new RenderEvent();
+    RenderEvent AFTER_HUD_RENDER = new RenderEvent();
 
-    @NotNull
-    private static Event createEvent() {
-        return EventFactory.createArrayBacked(RenderCallback.class, listeners -> (buffers, context) -> {
-            for (RenderCallback listener : (listeners)) {
+    final class RenderEvent {
+        private final CopyOnWriteArrayList<RenderCallback> listeners = new CopyOnWriteArrayList<>();
+        private final RenderCallback invoker = (buffers, context) -> {
+            for (RenderCallback listener : listeners) {
                 try {
                     listener.onRender(buffers, context);
                 } catch (Throwable throwable) {
                     LOGGER.error("Render listener failed", throwable);
                 }
             }
-        });
+        };
+
+        public void register(RenderCallback listener) {
+            listeners.add(Objects.requireNonNull(listener));
+        }
+
+        public RenderCallback invoker() {
+            return invoker;
+        }
     }
 }