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/slicedToArray.js

@@ -0,0 +1,8 @@
+var arrayWithHoles = require("./arrayWithHoles.js");
+var iterableToArrayLimit = require("./iterableToArrayLimit.js");
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+var nonIterableRest = require("./nonIterableRest.js");
+function _slicedToArray(r, e) {
+  return arrayWithHoles(r) || iterableToArrayLimit(r, e) || unsupportedIterableToArray(r, e) || nonIterableRest();
+}
+module.exports = _slicedToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;