xtermjs as SmartCell

[jannikbecher]

While trying to figure out a good api to communicate with a ssh server, I figured out, that it's not that easy. Furthermore there are already some ssh clients implemented in elixir (librarian and SSHEx) and reimplement the stuff in this kino doesn't feel right I had the idea of using an already existing library and the smartcell configures the connection.
Furthermore it can be possible to record running commands and store the replay inside the smart cell