devex: migrate to vue-i18n (#4966)

* sample languages refactor

* feat: consistency + dedupe impl of i18n

* fix: broken imports

* fix: intl formatted component

* fix: use relative imports

* fix: imports

* fix: comment out incomplete locales + fix imports

* feat: cleanup

* fix: ui imports

* fix: lint

* fix: admonition import

* make footer a component, fix language reactivity

* make copyright notice untranslatable

---------

Co-authored-by: Calum H. <contact@cal.engineer>

apps/frontend/src/error.vue

@@ -53,13 +53,14 @@
 <script setup>
 import { SadRinthbot } from '@modrinth/assets'
 import {
+	defineMessage,
+	IntlFormatted,
 	NotificationPanel,
 	provideModrinthClient,
 	provideNotificationManager,
 	providePageContext,
+	useVIntl,
 } from '@modrinth/ui'
-import { defineMessage, useVIntl } from '@vintl/vintl'
-import { IntlFormatted } from '@vintl/vintl/components'
 
 import Logo404 from '~/assets/images/404.svg'