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/test/index.mjs

@@ -0,0 +1,24 @@
+import { test } from 'uvu';
+import { is, type } from 'uvu/assert';
+import { resolve } from 'path';
+import load from '@proload/core';
+import typescript from '@proload/plugin-tsm';
+
+test.before(() => {
+    load.use([typescript]);
+})
+
+test('sanity', () => {
+    type(typescript, 'object');
+})
+
+const fixtures = ['ts', 'ts-config', 'cts', 'mts'];
+
+for (const fixture of fixtures) {
+    test(fixture, async () => {
+        let mdl = await load('test', { cwd: resolve(`fixtures/${fixture}`) });
+        is(mdl.value.value, fixture)
+    });
+}
+
+test.run();