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/@proload/plugin-tsm/README.md

@@ -0,0 +1,11 @@
+# `@proload/plugin-tsm`
+
+Enables the loading of `[namespace].config.ts`, `[namespace].config.cts`, and `[namespace].config.mts` files using [`@proload/core`](https://github.com/natemoo-re/proload).
+
+```js
+import load from '@proload/core';
+import typescript from '@proload/plugin-tsm';
+
+load.use([typescript]);
+await load('namespace');
+```