initial COmmit: Add KB Antora Importer plugin files

kb-antora-importer/kb-antora-importer.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * Plugin Name: KB Antora Importer
+ * Description: Imports GitLab/Antora based AsciiDoc documentation into WordPress as a versioned knowledgebase.
+ * Version: 0.1.0
+ * Requires PHP: 8.1
+ * Author: Codex
+ * Text Domain: kb-antora-importer
+ */
+
+declare(strict_types=1);
+
+if (! defined('ABSPATH')) {
+    exit;
+}
+
+define('KB_ANTORA_IMPORTER_VERSION', '0.1.0');
+define('KB_ANTORA_IMPORTER_FILE', __FILE__);
+define('KB_ANTORA_IMPORTER_DIR', plugin_dir_path(__FILE__));
+define('KB_ANTORA_IMPORTER_URL', plugin_dir_url(__FILE__));
+
+spl_autoload_register(static function (string $class): void {
+    $prefix = 'KbAntoraImporter\\';
+
+    if (0 !== strncmp($class, $prefix, strlen($prefix))) {
+        return;
+    }
+
+    $relative = substr($class, strlen($prefix));
+    $path = KB_ANTORA_IMPORTER_DIR . 'includes/' . str_replace('\\', '/', $relative) . '.php';
+
+    if (is_readable($path)) {
+        require_once $path;
+    }
+});
+
+register_activation_hook(__FILE__, [KbAntoraImporter\Plugin::class, 'activate']);
+register_deactivation_hook(__FILE__, [KbAntoraImporter\Plugin::class, 'deactivate']);
+
+add_action('plugins_loaded', static function (): void {
+    KbAntoraImporter\Plugin::instance()->boot();
+});