Add the new command to freight and update help.txt

This adds the command `new` to freight which creates a brand new project
in a given directory. It is exactly like init, but you choose where to
initialize the project. We also update the help text to include both the
init command which had not been updated in the help text and the new
command.

src/help.txt

@@ -3,6 +3,8 @@ Alternative for Cargo
 Usage: freight [COMMAND] [OPTIONS]
 
 Commands:
+    new      Create a new Freight Project with a given path
+    init     Create a new Freight Project in the current directory
     run      Build and run a Freight or Cargo Project
     build    Build a Freight or Cargo project
     test     Test a Freight or Cargo project

src/main.rs

@@ -1,12 +1,22 @@
 use std::env;
 use std::error::Error;
+use std::fs;
 use std::process;
 
 fn main() -> Result<(), Box<dyn Error>> {
     const HELP: &str = include_str!("help.txt");
 
     let mut args = env::args().skip(1);
     match args.next().as_ref().map(String::as_str) {
+        Some("new") => {
+            if let Some(dir) = &args.next() {
+                fs::create_dir_all(&dir)?;
+                freight::init(&dir)?;
+            } else {
+                println!("No directory given");
+                process::exit(1);
+            }
+        }
         Some("init") => freight::init(&env::current_dir()?)?,
         Some("run") => freight::run(args.collect::<Vec<String>>())?,
         Some("build") => freight::build()?,