API: Get Episode Info

type Response = {
  success: true,
  result: {
    episodeId: string,
    seq: number,
    title: string,
    podcastName: string,
    cover: string,
    // May be null
    epCover: string | null,
    // May be null
    description: string | null,
    // Unix timestamp in seconds
    publishTime: number,
    link: string,
    linkType: string,
    // Duration in seconds, may be null
    duration: number | null,
    transcribed: boolean,
    // May be null
    language: string | null,
  },
}