feat: add Polish language support

components/providers/intl-provider.tsx

@@ -11,6 +11,7 @@ import esMessages from '@/locales/es/common.json';
 import itMessages from '@/locales/it/common.json';
 import deMessages from '@/locales/de/common.json';
 import nlMessages from '@/locales/nl/common.json';
+import plMessages from '@/locales/pl/common.json';
 import ptMessages from '@/locales/pt/common.json';
 import ruMessages from '@/locales/ru/common.json';
 
@@ -24,6 +25,7 @@ const ALL_MESSAGES = {
   it: itMessages,
   de: deMessages,
   nl: nlMessages,
+  pl: plMessages,
   pt: ptMessages,
   ru: ruMessages,
 };

components/ui/language-switcher.tsx

@@ -17,6 +17,7 @@ export function LanguageSwitcher({ className }: { className?: string }) {
     { value: 'it', label: 'Italiano' },
     { value: 'de', label: 'Deutsch' },
     { value: 'nl', label: 'Nederlands' },
+    { value: 'pl', label: 'Polski' },
     { value: 'pt', label: 'Português' },
     { value: 'ru', label: 'Русский' }
   ];