Maybe use coproc for wish communication

[phil294]

tkbash/tkbash

Line 320 in 1172b83

# TODO: instead of all of this function, and instead of all the WISH_PIPE stuff as well, maybe consider using coproc logic instead. This could help with the back and forth sending of text to wish and simplify the code. Not sure though.

Besides, maybe the --command files could be put into memory instead of files at /tmp/__tkbash as it is right now. Then we could get rid of the folder altogether