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/inherits.js

@@ -0,0 +1,14 @@
+var setPrototypeOf = require("./setPrototypeOf.js");
+function _inherits(t, e) {
+  if ("function" != typeof e && null !== e) throw new TypeError("Super expression must either be null or a function");
+  t.prototype = Object.create(e && e.prototype, {
+    constructor: {
+      value: t,
+      writable: !0,
+      configurable: !0
+    }
+  }), Object.defineProperty(t, "prototype", {
+    writable: !1
+  }), e && setPrototypeOf(t, e);
+}
+module.exports = _inherits, module.exports.__esModule = true, module.exports["default"] = module.exports;