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/objectSpread2.js

@@ -0,0 +1,23 @@
+var defineProperty = require("./defineProperty.js");
+function ownKeys(e, r) {
+  var t = Object.keys(e);
+  if (Object.getOwnPropertySymbols) {
+    var o = Object.getOwnPropertySymbols(e);
+    r && (o = o.filter(function (r) {
+      return Object.getOwnPropertyDescriptor(e, r).enumerable;
+    })), t.push.apply(t, o);
+  }
+  return t;
+}
+function _objectSpread2(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? arguments[r] : {};
+    r % 2 ? ownKeys(Object(t), !0).forEach(function (r) {
+      defineProperty(e, r, t[r]);
+    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
+      Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
+    });
+  }
+  return e;
+}
+module.exports = _objectSpread2, module.exports.__esModule = true, module.exports["default"] = module.exports;