feat: install next-intl and set up i18n routing config

src/i18n/request.ts

@@ -0,0 +1,13 @@
+import { getRequestConfig } from 'next-intl/server'
+import { routing } from './routing'
+
+export default getRequestConfig(async ({ requestLocale }) => {
+  let locale = await requestLocale
+  if (!locale || !(routing.locales as readonly string[]).includes(locale)) {
+    locale = routing.defaultLocale
+  }
+  return {
+    locale,
+    messages: (await import(`../../messages/${locale}.json`)).default,
+  }
+})

src/i18n/routing.ts

@@ -0,0 +1,6 @@
+import { defineRouting } from 'next-intl/routing'
+
+export const routing = defineRouting({
+  locales: ['en', 'fr', 'es', 'it'],
+  defaultLocale: 'en',
+})

src/navigation.ts

@@ -0,0 +1,4 @@
+import { createNavigation } from 'next-intl/navigation'
+import { routing } from './i18n/routing'
+
+export const { Link, redirect, usePathname, useRouter } = createNavigation(routing)