API: Import Episode

type RequestBody = {
  // A Xiaoyuzhou episode URL or a YouTube video URL
  // Supported formats:
  //   https://www.xiaoyuzhoufm.com/episode/{episode-id}
  //   https://www.youtube.com/watch?v={video-id}
  //   https://youtu.be/{video-id}
  url: string,
}

type Response = {
  success: true,
  result: {
    seq: number,
    title: string,
    podcastName: string,
    episodeId: string,
    podcastId: string,
    // Unix timestamp in seconds
    publishTime: number,
    cover: string,
    // Duration in seconds
    duration: number,
  },
}