**DonutShell's First Release!**
Features
- add config (`config.json`) for customization (2c1246d)
- add a separate `read_config` function for reading config (d27b658)
- Now properly exits when a `ctrl-d` is detected (b1ea798)
- Add docs file for documentation (796890c)
Bug Fixes
- Fix `history` built in command not working (49c58a2)
- Fix shell saving empty text to history (49c58a2)
- fix `KeyboardInterrupt` error at input (5d472bc)