feat: make possible to delete an account by admin

Resolve #8830

packages/backend/src/services/delete-account.ts

@@ -0,0 +1,23 @@
+import { Users } from '@/models/index.js';
+import { createDeleteAccountJob } from '@/queue/index.js';
+import { publishUserEvent } from './stream.js';
+import { doPostSuspend } from './suspend-user.js';
+
+export async function deleteAccount(user: {
+	id: string;
+	host: string | null;
+}): Promise<void> {
+	// 物理削除する前にDelete activityを送信する
+	await doPostSuspend(user).catch(e => {});
+
+	createDeleteAccountJob(user, {
+		soft: false,
+	});
+
+	await Users.update(user.id, {
+		isDeleted: true,
+	});
+
+	// Terminate streaming
+	publishUserEvent(user.id, 'terminate', {});
+}