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-http-backend/CHANGELOG.md

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+### 2.7.3
+
+- optimize fetchApi selector [backported]
+
+### 2.7.1
+
+- same as 2.6.2
+
+### 2.7.0
+
+- deprecated, same as v3.0.0
+
+### 2.6.2
+
+- improve network error detection across browsers [152](https://github.com/i18next/i18next-http-backend/pull/152)
+
+### 2.6.1
+
+- optimize "Failed to fetch" retry case [147](https://github.com/i18next/i18next-http-backend/issues/147)
+
+### 2.6.0
+
+- fix "Failed to fetch" retry case [147](https://github.com/i18next/i18next-http-backend/issues/147)
+
+### 2.5.2
+
+- dereference timers in node.js so that the process may exit when finished [139](https://github.com/i18next/i18next-http-backend/pull/139)
+
+### 2.5.1
+
+- fix: remove typeof window.document === 'undefined' check which deopt bundle optimization [137](https://github.com/i18next/i18next-http-backend/pull/137)
+
+### 2.5.0
+
+- added fetch interceptor to the Backend Options [133](https://github.com/i18next/i18next-http-backend/pull/133)
+
+### 2.4.3
+
+- fix: overriding options
+
+### 2.4.2
+
+- fix: mjs typings export
+
+### 2.4.1
+
+- fix: separate cjs and mjs typings
+
+### 2.3.1
+
+- fix for browser usage
+
+### 2.3.0
+
+- update deps
+
+### 2.2.2
+
+- hack for debug mode in react-native
+
+### 2.2.1
+
+- fix for types moduleResolution "node16"
+
+### 2.2.0
+
+- parseLoadPayload for POST request [110](https://github.com/i18next/i18next-http-backend/pull/110)
+
+### 2.1.1
+
+- regression fix for saveMissing signature [1890](https://github.com/i18next/i18next/issues/1890)
+
+### 2.1.0
+
+- typescript: export the backend options type [105](https://github.com/i18next/i18next-http-backend/pull/105)
+
+### 2.0.2
+
+- typescript: static type prop
+
+### 2.0.1
+
+- fix if url starts with file:// [100](https://github.com/i18next/i18next-http-backend/issues/100)
+
+### 2.0.0
+
+- typescript: update for major i18next version
+