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/server/api/stream/types.ts

@@ -64,6 +64,9 @@ export interface BroadcastTypes {
 			[other: string]: any;
 		}[];
 	};
+	announcementCreated: {
+		announcement: Packed<'Announcement'>;
+	};
 }
 
 export interface MainStreamTypes {
@@ -105,6 +108,9 @@ export interface MainStreamTypes {
 	driveFileCreated: Packed<'DriveFile'>;
 	readAntenna: Antenna;
 	receiveFollowRequest: Packed<'User'>;
+	announcementCreated: {
+		announcement: Packed<'Announcement'>;
+	};
 }
 
 export interface DriveStreamTypes {