Adding hacking messages for requests console and fire alarm

- Adds messages for the requests consoles when opening/closing the maintenance panel and rewiring. 
- Adds message & sound for fire alarm when screwdriving it open/closed.

edit:

- Removes var/wiresexposed and uses panel_open instead.
- Adds a message when wrenching/unwrenching a computer frame

edit2:
- Replaces 'wiresexposed' with 'panel_open' in datums/wires/alarm.dm