feat: refine announcement (#11497)

* wip

* Update read-announcement.ts

* wip

* wip

* wip

* Update index.d.ts

* wip

* Create 1691649257651-refine-announcement.js

* wip

* wip

* wip

* wip

* wip

* wip

* Update announcements.vue

* wip

* wip

* Update announcements.vue

* wip

* Update announcements.vue

* wip

* Update misskey-js.api.md

* Update users.ts

* Create MkAnnouncementDialog.stories.impl.ts

* wip

* wip

* Create AnnouncementService.ts

packages/backend/src/misc/json-schema.ts

@@ -35,6 +35,7 @@ import { packedQueueCountSchema } from '@/models/json-schema/queue.js';
 import { packedGalleryPostSchema } from '@/models/json-schema/gallery-post.js';
 import { packedEmojiDetailedSchema, packedEmojiSimpleSchema } from '@/models/json-schema/emoji.js';
 import { packedFlashSchema } from '@/models/json-schema/flash.js';
+import { packedAnnouncementSchema } from '@/models/json-schema/announcement.js';
 
 export const refs = {
 	UserLite: packedUserLiteSchema,
@@ -46,6 +47,7 @@ export const refs = {
 	User: packedUserSchema,
 
 	UserList: packedUserListSchema,
+	Announcement: packedAnnouncementSchema,
 	App: packedAppSchema,
 	Note: packedNoteSchema,
 	NoteReaction: packedNoteReactionSchema,