Add optional $path argument for AccessLogHandler

[clue]

This changeset adds a new optional $path argument to the AccessLogHandler. If you do not want to log to the console, you can now configure an absolute log file path by passing an argument to the AccessLogHandler like this:

<?php

require __DIR__ . '/../vendor/autoload.php';

$container = new FrameworkX\Container([
    'accesslog' => __DIR__ . '/../logs/access.log',
    FrameworkX\AccessLogHandler::class => fn(string $accesslog) => new FrameworkX\AccessLogHandler($accesslog)
]);

$app = new FrameworkX\App($container);

// …

We will add more options to control access logging in follow-up PRs as discussed in #169.

Builds on top of #222, #175, #174, #31 and others

[SimonFrings]

Nice, let's get this in 👍