Added a confirmation prompt before executing the Real service commands.

This prevents accidental deletion of SLB Real servers.The system now asks the user to confirm the deletion

by entering 'yes' or 'no'.

If the user enters 'yes', the Real service will be deleted.

If the user enters 'no', the deletion will be cancelled.

1.Configured nameserver and host entries.

2.Executed delete commands (no ip nameserver, no ip host) and verified confirmation prompt appears.

3.Entered 'no' and confirmed deletion is cancelled.

4.Executed clear slb all and verified warning prompt; operation cancelled on 'no'.

5.Created real services (slb real https, slb real tcps).

6.Executed delete commands for real services and verified confirmation prompt appears.

7.Entered 'no' and confirmed deletion is cancelled; verified via show slb real all.

8.Executed delete with 'YES' for nameserver and confirmed successful deletion.

9.Verified final configuration using show commands