feat(client): 翻訳をIndexedDBに保存・プッシュ通知を翻訳 (#6396)

* wip

* tabun ok

* better msg

* oops

* fix lint

* Update gulpfile.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* Update src/client/scripts/set-i18n-contexts.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* refactor

Co-authored-by: acid-chicken <root@acid-chicken.com>

* ✨

* wip

* fix lint

* たぶんおk

* fix flush

* Translate Notification

* remove console.log

* fix

* add notifications

* remove san

* wip

* ok

* ✌️

* Update src/prelude/array.ts

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

* wip

* i18n refactor

* Update init.ts

* ✌️

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>
Co-authored-by: syuilo <syuilotan@yahoo.co.jp>

src/client/app.vue

@@ -136,15 +136,12 @@ import { faGripVertical, faChevronLeft, faHashtag, faBroadcastTower, faFireAlt,
 import { faBell, faEnvelope, faLaugh, faComments } from '@fortawesome/free-regular-svg-icons';
 import { ResizeObserver } from '@juggle/resize-observer';
 import { v4 as uuid } from 'uuid';
-import i18n from './i18n';
 import { host, instanceName } from './config';
 import { search } from './scripts/search';
 
 const DESKTOP_THRESHOLD = 1100;
 
 export default Vue.extend({
-	i18n,
-
 	components: {
 		XClock: () => import('./components/header-clock.vue').then(m => m.default),
 		MkButton: () => import('./components/ui/button.vue').then(m => m.default),