Rust Secret Cipher CLI

In this guided project, we will build a command line application in Rust that can encrypt and decrypt text using a caesar cipher. The caesar cipher is a simple substitution cipher that shifts the letters of the alphabet by a set number of places.

By the end of this guided project, you will be able to:

* Create a command line interface (CLI) application in Rust

* Implement caesar cipher encryption and decryption functions in Rust

* Build an executable binary that can encrypt/decrypt input text using caesar cipher

* Use Cargo for dependency and build management