When an undefined prefixed argument is provided, the current default behavior is to ignore this unknown argument.

Some command-line tools (Composer is an example) suggest alternative arguments based on a similarity between the unknown argument and those defined in the script.

This modification adds this functionality to CLImate without breaking compatibility with previous versions and without this functionality being mandatory.

The `League\CLImate\Argument\Manager::getUnknowPrefixedArgumentsAndSuggestions()` method returns an array with the unknown arguments as keys and the best argument suggestion as values, based on the PHP function [similar_text](https://www.php.net/manual/en/function.similar-text.php).

With this result, the developer can easily implement a message to the user informing about the unknown argument and offering alternatives, as in this example:

<?php
require_once 'vendor/autoload.php';

$climate = new \League\CLImate\CLImate();

$climate->arguments->add([
    'user' => [
        'longPrefix' => 'user',
    ],
    'password' => [
        'longPrefix' => 'password',
    ],
    'flag' => [
        'longPrefix' => 'flag',
        'noValue' => true,
    ],
]);

$climate->arguments->parse();
$suggestions = $climate->arguments->getUnknowPrefixedArgumentsAndSuggestions();

if(count($suggestions) > 0){
    $climate->error('Arguments not defined:');

    foreach ($suggestions as $arg => $suggest){
        if($suggest !== ''){
            $climate->info("\"$arg\" is not defined. Did you mean these? $suggest");
        }
    }
}

/*
 * Run:
 *
 * ~$ php .\test.php --user=baz --pass=123 --fag --xyz
 *
 * Return:
 *
 * Arguments not defined:
 * "pass" is not defined. Did you mean these? password
 * "fag" is not defined. Did you mean these? flag
 *
 */

Adds getCurrent() and getTotal() to Progress.

Issue #192