added defrag to turtle command

src/bin/Turtle.hx

@@ -1,5 +1,6 @@
 package bin;
 
+import lib.turtle.InvManager;
 import lib.CLIAppBase;
 
 using tink.CoreApi;
@@ -30,6 +31,15 @@ class Turtle extends CLIAppBase {
 		registerSyncSubcommand("down", (args) -> {
 			return checkAvailable() && perform(kernel.turtle.Turtle.down());
 		});
+
+		registerSyncSubcommand("defrag", (args) -> {
+			if (!checkAvailable()) {
+				return false;
+			}
+
+			InvManager.defrag();
+			return true;
+		});
 	}
 
 	private function checkAvailable():Bool {