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/asyncToGenerator.js

@@ -0,0 +1,26 @@
+function asyncGeneratorStep(n, t, e, r, o, a, c) {
+  try {
+    var i = n[a](c),
+      u = i.value;
+  } catch (n) {
+    return void e(n);
+  }
+  i.done ? t(u) : Promise.resolve(u).then(r, o);
+}
+function _asyncToGenerator(n) {
+  return function () {
+    var t = this,
+      e = arguments;
+    return new Promise(function (r, o) {
+      var a = n.apply(t, e);
+      function _next(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "next", n);
+      }
+      function _throw(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "throw", n);
+      }
+      _next(void 0);
+    });
+  };
+}
+export { _asyncToGenerator as default };