Implement DamageCause#CAMPFIRE and minor improvement in exception for Unhandled block damage

By: Doc <nachito94@msn.com>

paper-server/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -989,8 +989,10 @@ public class CraftEventFactory {
                 cause = DamageCause.MAGIC;
             } else if (source.is(DamageTypes.IN_FIRE)) {
                 cause = DamageCause.FIRE;
+            } else if (source.is(DamageTypes.CAMPFIRE)) {
+                cause = DamageCause.CAMPFIRE;
             } else {
-                throw new IllegalStateException(String.format("Unhandled damage of %s by %s from %s", entity, source.getDirectBlock(), source.getMsgId()));
+                throw new IllegalStateException(String.format("Unhandled damage of %s by %s from %s [%s]", entity, source.getDirectBlock(), source.getMsgId(), source.typeHolder().getRegisteredName()));
             }
             return callEntityDamageEvent(source.getDirectBlock(), source.getDirectBlockState(), entity, cause, bukkitDamageSource, modifiers, modifierFunctions, cancelled);
         }