Add GTFOBins reverse payloads

[terrorbyte]

This adds the NodeJS, Perl, Ruby, ksh, and socat payloads from the gtfobins project (with some modification). It's also the first steps to starting to figure out how to best break out payload logic.

This first set of payloads were the ones that allowed for direct inlining (ie not shelling out to python).

[j-baines]

Generally speaking, I like to see an ssl option since go-exploit does provide an encrypted reverse shell.

[terrorbyte]

I'm going to abandon this and start it over with the new payload structure.