wip...
A shell design inspired from CS 162. Implements REPL architecture "Read-Eval-Print Loop" and Unix standards according to Bash and Zsh.
Obviously, this isn't the most pristine piece of code I've written, and I learned that there's insanely more depth and complexity to a shell engine than I can imagine. But at least I enjoyed doing it, learned alot about TTYs, pipes & fds and it works (🙏 on my hardware).
