ki-shell option to run script in non-interactive mode

Sometimes we need to run some script non-interactively (say for some small automation). It would be nice to have the argument for shell to point program source location.

For reference in `awk` it's `-f` and `--file`, in `sed` it's the same.

Python also has `-c` option, which allows passing arbitrary expression like `python -c "expression"`

Start at the ki-shell command entry point and its argument parsing. Add an option that accepts a script source location and runs it non-interactively, then verify that a supplied script executes without an interactive prompt.

Written by the indexing model from the issue text.