[WordPress] Suggestions for Organizing Procedural Code

00-acme-plugin.php

<?php
/**
 * Plugin Name: Acme Plugin
 * Plugin URI:  https://acmeplugins.com/acme
 * Description: This is the plugin description.
 * Version:     1.0.0
 * Author:      Acme Plugins Co.
 * Author URI:  https://acmeplugins.com/acme
 * License:     GPL-3.0+
 * License URI: http://www.gnu.org/licenses/gpl-3.0.txt
 *
 * @since   1.0.0
 * @package Acme
 */

namespace Acme;

defined( 'WPINC' ) || die;

// Include the custom autoloader.
require_once __DIR__ . '/inc/autoload.php';

// Include action and filters.
require_once __DIR__ . '/inc/actions.php';
require_once __DIR__ . '/inc/filters.php';