in instead of getline like functionality
  -e code : Execute a string of janet
  -r : Enter the repl after running all scripts
  -p : Keep on executing if there is a top level error (persistent)
  -q : Hide prompt, logo, and repl output (quiet)
  -k : Compile scripts but do not execute
  -m syspath : Set system path for loading global modules
  -c source output : Compile janet source code into an image
  -n : Disable ANSI color output in the repl
  -l path : Execute code in a file before running the main sc