feat: add MCP server for the website chatbot over a mirrored TYPO3 content feed

src/Chatbot/Mcp/Sites.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Chatbot\Mcp;
+
+/**
+ * The site identifiers of the TYPO3 content feed, offered to the model as the `site` filter.
+ * ep-events and unichamp are retired and not in the feed.
+ */
+final class Sites
+{
+    public const IDENTIFIERS = ['ep-reisen', 'ser', 'ski-boarderweek', 'ski-wochenenden', 'snowzone'];
+
+    public const DESCRIPTION = 'Restrict to one website: ep-reisen (ep-reisen.de), ser (semesterende-skireisen.de), ski-boarderweek, ski-wochenenden, snowzone (snowzone.net).';
+}