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/classStaticPrivateFieldSpecGet.js

@@ -0,0 +1,7 @@
+var classApplyDescriptorGet = require("./classApplyDescriptorGet.js");
+var assertClassBrand = require("./assertClassBrand.js");
+var classCheckPrivateStaticFieldDescriptor = require("./classCheckPrivateStaticFieldDescriptor.js");
+function _classStaticPrivateFieldSpecGet(t, s, r) {
+  return assertClassBrand(s, t), classCheckPrivateStaticFieldDescriptor(r, "get"), classApplyDescriptorGet(t, r);
+}
+module.exports = _classStaticPrivateFieldSpecGet, module.exports.__esModule = true, module.exports["default"] = module.exports;