initial COmmit: Add KB Antora Importer plugin files

kb-antora-importer/includes/Antora/AntoraParser.php

@@ -0,0 +1,22 @@
+<?php
+declare(strict_types=1);
+
+namespace KbAntoraImporter\Antora;
+
+final class AntoraParser
+{
+    public function pageSlugFromPath(string $path): string
+    {
+        $name = preg_replace('/\.adoc$/', '', basename($path)) ?: basename($path);
+        return 'index' === $name ? '' : sanitize_title($name);
+    }
+
+    public function moduleFromPath(string $path): string
+    {
+        if (preg_match('#^modules/([^/]+)/#', $path, $matches)) {
+            return $matches[1];
+        }
+
+        return 'ROOT';
+    }
+}