feat: support copying IP address

[kranurag7]

I use wishlist to ssh into remote machines and sometimes the machines are down. Sometimes for baremetal servers, I need to use ensure whether the machine is back or not after installing a new image.

For this purpose, I have to open my ~/.ssh/config file and copy the IP address for pinging, it would be great if wishlist has a key-binding for copying the IP address of the machine.