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/components/post-form.vue

@@ -57,7 +57,6 @@ import { faEyeSlash, faLaughSquint } from '@fortawesome/free-regular-svg-icons';
 import insertTextAtCursor from 'insert-text-at-cursor';
 import { length } from 'stringz';
 import { toASCII } from 'punycode';
-import i18n from '../i18n';
 import MkVisibilityChooser from './visibility-chooser.vue';
 import MkUserSelect from './user-select.vue';
 import XNotePreview from './note-preview.vue';
@@ -70,8 +69,6 @@ import { formatTimeString } from '../../misc/format-time-string';
 import { selectDriveFile } from '../scripts/select-drive-file';
 
 export default Vue.extend({
-	i18n,
-
 	components: {
 		XNotePreview,
 		XUploader: () => import('./uploader.vue').then(m => m.default),