Command-line application framework.

Example

A simple command-line application could look something like this:

```rs use rawcmd::{Command, Flag, Intent};

fn main() { match Command::withname("foo") .withdescription("Command 1") .withflag( Flag::withname("flag1") .withalias("f1") .withdescription("Flag 1") ) .withsubcommand( Command::withname("bar") .withdescription("Command 1:1") .withflag( Flag::withname("flag2") .withalias("f2") .withdescription("Flag 2") ) .withresolver(|| Ok(2)) ) .withresolver(|_| Ok(3)) .run() { Ok(code) => { println!("Success: {:?}", code); std::process::exit(0); }, Err(error) => { println!("Error: {:?}", error); std::process::exit(1); }, } } ```

TO-DO