Load extra commands from home directory

[github-actions]

This PR closes #152 and adds the ability to load extra commands from home directory. It also adds support to run all commands in the site:create:* namespace after site:create command.

Extra Commands

Suppose the following PHP file is in ~/.joomlatools/console/commands/CertCreate.php :

<?php
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

use Joomlatools\Console\Command\Site\AbstractSite;

class CertCreate extends AbstractSite
{
    protected function configure()
    {
        parent::configure();

        $this
            ->setName('cert:create')
            ->setAliases(['site:create:cert'])
            ->setDescription('Creates a new Minica certificate')
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        parent::execute($input, $output);

        return 0;
    }
}

This file will be loaded automatically as the cert:create command so that you can do joomla cert:create foo

Running extra commands after site:create

Note that the above file has this line in the configure method: ->setAliases(['site:create:cert'])

When the site:create command runs it'll run all commands that has a name or alias that starts with site:create:. So having this alias automatically runs cert:create after site:create command with the same site name.