feat: Add pl translation (#2302)

Added Polish translation files.

[skip ci]

project.inlang/settings.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://inlang.com/schema/project-settings",
   "sourceLanguageTag": "en",
-  "languageTags": ["ca", "de", "en", "fr", "it", "pt-BR", "pt-PT"],
+  "languageTags": ["ca", "de", "en", "fr", "it", "pl", "pt-BR", "pt-PT"],
   "modules": [
     "https://cdn.jsdelivr.net/npm/@inlang/plugin-json@latest/dist/index.js",
     "https://cdn.jsdelivr.net/npm/@inlang/message-lint-rule-empty-pattern@latest/dist/index.js",