feat: manifest checks, Divi compatibility from manifests, reference fingerprints

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/Integrations/Divi/Release/DiviEnvironment.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\Divi\Release;
+
+defined('ABSPATH') || exit;
+
+/**
+ * The installed Divi theme: version (the parent's for a child theme) and directory; null when Divi is not the
+ * template.
+ */
+final class DiviEnvironment
+{
+    public const TEMPLATE = 'Divi';
+
+    public static function version(): ?string
+    {
+        $theme = wp_get_theme();
+        if ($theme->get_template() !== self::TEMPLATE) {
+            return null;
+        }
+        $parent = $theme->parent();
+
+        return (string) ($parent ? $parent->get('Version') : $theme->get('Version'));
+    }
+
+    public static function themeDir(): ?string
+    {
+        return wp_get_theme()->get_template() === self::TEMPLATE ? (string) get_template_directory() : null;
+    }
+}