Add dequeuing ready queue path in mo_task_delay()

Previously, mo_task_delay() only set TASK_BLOCKED and updated
delayed ticks. In the new ready-queue-based scheduler, delayed
tasks must also be removed from the ready queue.

This change calls sched_dequeue_task() in mo_task_delay() so
that the task is properly dequeued from its priority ready
queue when it is delayed.

Author: vicLin8712

kernel/task.c

@@ -752,11 +752,13 @@ void mo_task_delay(uint16_t ticks)
 
     tcb_t *self = kcb->task_current->data;
 
-    /* Set delay and blocked state - scheduler will skip blocked tasks */
+    /* Set delay and blocked state, dequeue from ready queue */
+    list_node_t *rq_node = sched_dequeue_task(self);
     self->delay = ticks;
     self->state = TASK_BLOCKED;
     NOSCHED_LEAVE();
 
+    free(rq_node);
     mo_task_yield();
 }