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/defineEnumerableProperties.js

@@ -0,0 +1,12 @@
+function _defineEnumerableProperties(e, r) {
+  for (var t in r) {
+    var n = r[t];
+    n.configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, t, n);
+  }
+  if (Object.getOwnPropertySymbols) for (var a = Object.getOwnPropertySymbols(r), b = 0; b < a.length; b++) {
+    var i = a[b];
+    (n = r[i]).configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, i, n);
+  }
+  return e;
+}
+module.exports = _defineEnumerableProperties, module.exports.__esModule = true, module.exports["default"] = module.exports;