This PR improves Console help UX and makes behavior more suitable when the package is embedded in non-CakePHP applications.

Why this matters for third-party usage

These changes are particularly useful for third-party implementations because help output should reflect the host app, not assume CakePHP context. Without this, users can see misleading framework/version branding and noisier command discovery flow.

What changed

• Running with no command now doesn't show the “no command provided” error line. (this was really BAD UX in my book)
• help is now hidden from command listings via CommandHiddenInterface.
  • Reason: when users are already in help output, listing help adds noise and little value; help remains available via the help command.
• Added a pluggable header extension point so host apps can provide their own help header:
  • ConsoleHelpHeaderProviderInterface.php
  • wired through CommandRunner.php
• Default CakePHP header in HelpCommand.php now appears only in CakePHP context (known Cake version) and is shown in non verbose mode too. (good UX)
• Improved readability of compact command output in HelpCommand.php:
  • tuned spacing between command and description
  • visual distinction between group headers and command names

Example: custom Console help header

Implement ConsoleHelpHeaderProviderInterface on the application class used by CommandRunner:

<?php
declare(strict_types=1);

namespace App;

use Cake\Console\CommandCollection;
use Cake\Core\ConsoleApplicationInterface;
use Cake\Core\ConsoleHelpHeaderProviderInterface;

final class Application implements ConsoleApplicationInterface, ConsoleHelpHeaderProviderInterface
{
    public function bootstrap(): void
    {
        // bootstrap logic
    }

    public function console(CommandCollection $commands): CommandCollection
    {
        return $commands;
    }

    public function getConsoleHelpHeader(): string
    {
        return '<info>Foo Commander:</info> 1.4.0 (env: prod)';
    }
}

When this interface is implemented, the custom header is shown in help output instead of the default CakePHP header.

Examples in a Cake context

Examples in a Custom app context

BEFORE:

AFTER: