Enhance compatibility and feature support for Minecraft 1.21: Add ProtocolWrapper21, update gamerule management, streamline entity tracking, and refine chunk hider logic.

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/FightSystem.java

@@ -188,6 +188,8 @@ public class FightSystem extends JavaPlugin {
         }else if(Config.mode == ArenaMode.PREPARE) {
             Fight.getUnrotated().setSchem(SchematicNode.getSchematicNode(Config.PrepareSchemID));
         }
+
+        CraftbukkitWrapper.impl.setupGamerule();
     }
 
     @Override

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/utils/CraftbukkitWrapper.java

@@ -33,4 +33,6 @@ public interface CraftbukkitWrapper {
     float headRotation(Entity e);
 
     Stream<?> entityIterator();
+
+    void setupGamerule();
 }

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/utils/TechHiderWrapper.java

@@ -59,7 +59,7 @@ public class TechHiderWrapper extends StateDependent implements TechHider.Locati
     private final SecretKey key;
 
     public TechHiderWrapper() {
-        super(ENABLED, FightState.All);
+        super(ENABLED, FightState.Schem);
         techHider = new TechHider(this, Config.ObfuscateWith, Config.HiddenBlocks, Config.HiddenBlockEntities);
 
         try {
@@ -68,7 +68,7 @@ public class TechHiderWrapper extends StateDependent implements TechHider.Locati
             throw new SecurityException(e);
         }
 
-        new StateDependentListener(ENABLED, FightState.All, this);
+        new StateDependentListener(ENABLED, FightState.Schem, this);
         register();
     }