feat: テスト通知を送信できるようにする (#11810)

* (add) Notification test

* Update Changelog

* (add) backend, frontend impl

* globalEventの名前を明確にする

* Run API Extractor

packages/backend/src/server/api/endpoints/notifications/test-notification.ts

@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { NotificationService } from '@/core/NotificationService.js';
+
+export const meta = {
+	tags: ['notifications'],
+
+	requireCredential: true,
+
+	kind: 'write:notifications',
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {},
+	required: [],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private notificationService: NotificationService,
+	) {
+		super(meta, paramDef, async (ps, user) => {
+			this.notificationService.createNotification(user.id, 'test', {});
+		});
+	}
+}