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/package.json

@@ -16,12 +16,10 @@
 	"devDependencies": {
 		"@formatjs/cli": "^6.2.12",
 		"@nuxt/devtools": "^1.3.3",
+		"@nuxtjs/i18n": "^8.5.5",
 		"@types/dompurify": "^3.0.5",
 		"@types/iso-3166-2": "^1.0.4",
 		"@types/node": "^20.1.0",
-		"@vintl/compact-number": "^2.0.5",
-		"@vintl/how-ago": "^3.0.1",
-		"@vintl/nuxt": "^1.9.2",
 		"autoprefixer": "^10.4.19",
 		"eslint": "^8.57.0",
 		"glob": "^10.2.7",
@@ -48,7 +46,7 @@
 		"@pinia/nuxt": "^0.5.1",
 		"@tanstack/vue-query": "^5.90.7",
 		"@types/three": "^0.172.0",
-		"@vintl/vintl": "^4.4.1",
+		"intl-messageformat": "^10.7.7",
 		"@vitejs/plugin-vue": "^5.0.4",
 		"@vue-email/components": "^0.0.21",
 		"@vue-email/render": "^0.0.9",