Reduce CPU load when moving around the world

Should've made this multiple commits, but too late now

- Create ConfigThreadPool to remove duplicate thread setup/config code
- Move configurable thread pools into their own ThreadPools class
- Add a semaphore to limit how many LOD builder/lighting/bufferBuilder threads can be active at once

common/src/main/java/com/seibel/distanthorizons/common/wrappers/worldGeneration/GenerationEvent.java

@@ -27,10 +27,12 @@ import java.util.function.Consumer;
 
 import com.seibel.distanthorizons.api.enums.worldGeneration.EDhApiWorldGenerationStep;
 import com.seibel.distanthorizons.core.generation.WorldGenerationQueue;
+import com.seibel.distanthorizons.core.util.ThreadUtil;
 import com.seibel.distanthorizons.core.util.objects.UncheckedInterruptedException;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
 import com.seibel.distanthorizons.core.pos.DhChunkPos;
 import com.seibel.distanthorizons.core.util.objects.EventTimer;
+import com.seibel.distanthorizons.core.util.threading.ThreadPools;
 import com.seibel.distanthorizons.core.wrapperInterfaces.chunk.IChunkWrapper;
 
 import org.apache.logging.log4j.Logger;
@@ -121,7 +123,7 @@ public final class GenerationEvent
 	public boolean terminate()
 	{
 		LOGGER.info("======================DUMPING ALL THREADS FOR WORLD GEN=======================");
-		WorldGenerationQueue.THREAD_FACTORY.dumpAllThreadStacks();
+		ThreadPools.WORLD_GEN_THREAD_FACTORY.dumpAllThreadStacks();
 		this.future.cancel(true);
 		return this.future.isCancelled();
 	}