Refacor electron app and add migrations

electron/cqrs/commands/handlers/deleteRoom.ts

@@ -0,0 +1,9 @@
+import { DataSource } from 'typeorm';
+import { RoomEntity, MessageEntity } from '../../../entities';
+import { DeleteRoomCommand } from '../../types';
+
+export async function handleDeleteRoom(command: DeleteRoomCommand, dataSource: DataSource): Promise<void> {
+  const { roomId } = command.payload;
+  await dataSource.getRepository(RoomEntity).delete({ id: roomId });
+  await dataSource.getRepository(MessageEntity).delete({ roomId });
+}