Feature to conditionally hide commands

[RyanNerd]

Overview

This pull request:

• Fixes a bug
• Adds a feature
• Breaks backwards compatibility
• Has tests that cover changes
• Adds or fixes documentation

Summary

If a command class has a public string|array $hiddenCommands property then any command listed in the property will not be added to Robo

Closes #1013

Description

For example:

<?php
class MyCommands
{
    public $hiddenCommands = [];

    public function __construct()
    {
        if (str_contains('window', strtolower(PHP_OS))) {
            // We're using Windows so hide the linux:example command
            $this->hiddenCommands[] = 'linux:example';
        } else {
            // We're not using Windows so hide the com command
            $this->hiddenCommands[] = 'com';
        }
    }

    /**
     * This command will always be available
     */
    public function hello()
    {
        $this->say('Hi!');
    }

    /**
     * @hidden This command will not be available because it has a hidden attribute
     */
    public function goodBye()
    {
        $this->say('Bye!');
    }

    /**
     * Command will not work in Windows
     * @link: https://www.php.net/manual/en/function.cli-set-process-title.php
     */
    public function linuxExample()
    {
        $title = "My Amazing PHP Script";
        $pid = getmypid(); // you can use this to see your process title in ps

        if (!cli_set_process_title($title)) {
            echo "Unable to set process title for PID $pid...\n";
            exit(1);
        } else {
            echo "The process title '$title' for PID $pid has been set for your process!\n";
            sleep(5);
        }
    }

    /**
     * COM is only available on Windows
     */
    public function com()
    {
        $domainObject = new COM("WinNT://Domain");
        foreach ($domainObject as $obj) {
            $this->say($obj->Name);
        }
    }
}