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>

packages/ui/src/components/project/settings/environment/ProjectSettingsEnvSelector.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 import type { Labrinth } from '@modrinth/api-client'
-import { defineMessage, type MessageDescriptor, useVIntl } from '@vintl/vintl'
 import { computed, ref, watch } from 'vue'
 
+import { defineMessage, type MessageDescriptor, useVIntl } from '../../../../composables/i18n'
 import { commonProjectSettingsMessages } from '../../../../utils'
 import LargeRadioButton from '../../../base/LargeRadioButton.vue'