rcshell 0.0.1-alpha.1

# plan9 rc in rust

- Goal: Implement [plan9 rc](https://man.cat-v.org/plan_9/1/rc) in Rust.
- Plan: Stay true to [9front](http://www.9front.org/releases/) implementation.
- License: GPL-3.0-or-later
- Disclaimer: This is just a hobby project. Don't expect anything anytime soon.

## ChangeLog

### 0.0.1-alpha.1

- add initial repl using rustyline.
- implement initial lexer/tokenizer using nom.