feat: refine announcement (#11497)

* wip

* Update read-announcement.ts

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* Update index.d.ts

* wip

* Create 1691649257651-refine-announcement.js

* wip

* wip

* wip

* wip

* wip

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* Update announcements.vue

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* Update announcements.vue

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* Update announcements.vue

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* Update misskey-js.api.md

* Update users.ts

* Create MkAnnouncementDialog.stories.impl.ts

* wip

* wip

* Create AnnouncementService.ts

packages/backend/src/models/json-schema/announcement.ts

@@ -0,0 +1,58 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export const packedAnnouncementSchema = {
+	type: 'object',
+	properties: {
+		id: {
+			type: 'string',
+			optional: false, nullable: false,
+			format: 'id',
+			example: 'xxxxxxxxxx',
+		},
+		createdAt: {
+			type: 'string',
+			optional: false, nullable: false,
+			format: 'date-time',
+		},
+		updatedAt: {
+			type: 'string',
+			optional: false, nullable: true,
+			format: 'date-time',
+		},
+		text: {
+			type: 'string',
+			optional: false, nullable: false,
+		},
+		title: {
+			type: 'string',
+			optional: false, nullable: false,
+		},
+		imageUrl: {
+			type: 'string',
+			optional: false, nullable: true,
+		},
+		icon: {
+			type: 'string',
+			optional: false, nullable: false,
+		},
+		display: {
+			type: 'string',
+			optional: false, nullable: false,
+		},
+		forYou: {
+			type: 'boolean',
+			optional: false, nullable: false,
+		},
+		needConfirmationToRead: {
+			type: 'boolean',
+			optional: false, nullable: false,
+		},
+		isRead: {
+			type: 'boolean',
+			optional: true, nullable: false,
+		},
+	},
+} as const;