Add doc to script file

src/components/language-selector.tsx

@@ -1,3 +1,13 @@
+/**
+ * Language Selector Component
+ *
+ * Provides UI for switching between supported languages (English/German).
+ * Uses shadcn/ui Select component.
+ *
+ * @author Andreas Weyer
+ * @license MIT
+ */
+
 import React from 'react';
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from './ui/select';
 import { Label } from './ui/label';