rune should allow users to set register values and start/break addresses in the console

[chinmaydd]

Right now, the user requires to type in a long command to set up a session. This makes it a little cumbersome since a single error in the command would require them to fix the command again. It would be ideal if we could have a default context setup and then the user could interact in the console to set those values.

Example:

krypt0@chinmaydd: runec ./a.out
[+] Loading default context values
>> set zf=1
>> set break=0x8000
>> run
[+] Halted at 0x8000