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/i18next-browser-languagedetector/.prettierrc

@@ -0,0 +1,8 @@
+{
+  "bracketSpacing": true,
+  "jsxBracketSameLine": false,
+  "printWidth": 100,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all"
+}