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

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

packages/ui/src/composables/index.ts

@@ -1,4 +1,5 @@
 export * from './debug-logger'
 export * from './dynamic-font-size'
 export * from './how-ago'
+export * from './i18n'
 export * from './scroll-indicator'