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/superPropGet.js

@@ -0,0 +1,9 @@
+var get = require("./get.js");
+var getPrototypeOf = require("./getPrototypeOf.js");
+function _superPropGet(t, o, e, r) {
+  var p = get(getPrototypeOf(1 & r ? t.prototype : t), o, e);
+  return 2 & r && "function" == typeof p ? function (t) {
+    return p.apply(e, t);
+  } : p;
+}
+module.exports = _superPropGet, module.exports.__esModule = true, module.exports["default"] = module.exports;