Add internationalization support with astro-i18next integration

- Implemented astro-i18next for multi-language support, including English, Dutch, and Italian.
- Configured default locale and language fallback settings.
- Defined routes for localized content in the configuration.
- Updated package.json and package-lock.json to include new dependencies for i18next and related plugins.

node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet.js

@@ -0,0 +1,7 @@
+import classApplyDescriptorGet from "./classApplyDescriptorGet.js";
+import classPrivateFieldGet2 from "./classPrivateFieldGet2.js";
+function _classPrivateFieldGet(e, t) {
+  var r = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorGet(e, r);
+}
+export { _classPrivateFieldGet as default };