koishi-plugin-adapter-iirose/src/encoder/system/room/subscribeRoom.ts

[IIROSE-蔷薇花园](https://iirose.com/)适配器

/**
 * 订阅房间
 * @param roomId 房间ID
 * @returns {string}
 */
export default (roomId: string): string =>
{
    return `=^v$1${roomId}`;
};