refactor!: Move queue command manager to command manager class

src/main/java/com/onarandombox/MultiverseCore/MultiverseCore.java

@@ -767,15 +767,6 @@ public class MultiverseCore extends JavaPlugin implements MVPlugin, Core {
         return this.commandManager;
     }
 
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    @Deprecated
-    public CommandQueueManager getCommandQueueManager() {
-        return commandQueueManager;
-    }
-
     /**
      * Shows a message that the given world is not a MultiverseWorld.
      *

src/main/java/com/onarandombox/MultiverseCore/api/Core.java

@@ -9,7 +9,6 @@ package com.onarandombox.MultiverseCore.api;
 
 import buscript.Buscript;
 import com.onarandombox.MultiverseCore.commandtools.MVCommandManager;
-import com.onarandombox.MultiverseCore.commandtools.queue.CommandQueueManager;
 import com.onarandombox.MultiverseCore.destination.DestinationsProvider;
 import com.onarandombox.MultiverseCore.utils.AnchorManager;
 import com.onarandombox.MultiverseCore.utils.MVEconomist;
@@ -87,15 +86,6 @@ public interface Core {
      */
     MVCommandManager getCommandManager();
 
-    /**
-     * Manager for command that requires /mv confirm before execution.
-     *
-     * @return A non-null {@link CommandQueueManager}.
-     * @deprecated To be moved to new command manager in 5.0.0
-     */
-    @Deprecated
-    CommandQueueManager getCommandQueueManager();
-
     /**
      * Gets the class responsible for loading many different destinations
      * on demand.

src/main/java/com/onarandombox/MultiverseCore/commandtools/MVCommandManager.java

@@ -9,6 +9,7 @@ import co.aikar.commands.CommandContexts;
 import co.aikar.commands.PaperCommandManager;
 import com.onarandombox.MultiverseCore.MultiverseCore;
 import com.onarandombox.MultiverseCore.commandtools.flags.CommandFlagsManager;
+import com.onarandombox.MultiverseCore.commandtools.queue.CommandQueueManager;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -18,6 +19,7 @@ public class MVCommandManager extends PaperCommandManager {
 
     private final MultiverseCore plugin;
     private CommandFlagsManager flagsManager;
+    private CommandQueueManager commandQueueManager;
 
     public MVCommandManager(@NotNull MultiverseCore plugin) {
         super(plugin);
@@ -41,6 +43,18 @@ public class MVCommandManager extends PaperCommandManager {
         return flagsManager;
     }
 
+    /**
+     * Manager for command that requires /mv confirm before execution.
+     *
+     * @return A non-null {@link CommandQueueManager}.
+     */
+    public synchronized @NotNull CommandQueueManager getCommandQueueManager() {
+        if (this.commandQueueManager == null) {
+            this.commandQueueManager = new CommandQueueManager(this.plugin);
+        }
+        return commandQueueManager;
+    }
+
     /**
      * Gets class responsible for parsing string args into objects.
      *