feat: cancel all task when disable engine

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/nukkit/src/task.ts

@@ -15,6 +15,9 @@ export class NukkitTaskManager implements task.TaskManager {
     callSyncMethod(func: Function): any {
         return func()
     }
+    disable() {
+        base.getInstance().getServer().getScheduler().cancelTask(this.pluginInstance)
+    }
 }
 
 export class NukkitTask extends task.Task {