Add DamageType RegistryEvent (#11783)

paper-server/src/main/java/io/papermc/paper/PaperServerInternalAPIBridge.java

@@ -0,0 +1,15 @@
+package io.papermc.paper;
+
+import org.bukkit.craftbukkit.damage.CraftDamageEffect;
+import org.bukkit.damage.DamageEffect;
+import org.jspecify.annotations.NullMarked;
+
+@NullMarked
+public class PaperServerInternalAPIBridge implements InternalAPIBridge {
+    public static final PaperServerInternalAPIBridge INSTANCE = new PaperServerInternalAPIBridge();
+
+    @Override
+    public DamageEffect getDamageEffect(final String key) {
+        return CraftDamageEffect.getById(key);
+    }
+}