The command class should return literal arguments

[c4spar]

The command class and the command action handler should also return the literal arguments array which is return by the parseFlags() method.

deno run file.ts arg1 arg2 -- --flag1 val arg1

const { args, options, cmd, literal } = await new Command()
    // ...
    .parse( [ 'arg1', 'arg2', '--', '--flag1', 'val', 'arg1' ] ); 

console.log( literal ); // <-- [ '--flag1', 'val', 'arg1' ]

Provide also a way to access literal arguments inside a command action handler.