[Feature]: Retrieve comments in a gist

[KEINOS]

Feature request

Method to get the comments of a specified gist ID.

obj := gisty.NewGisty()

listComments, err := obj.GetComments(gistID)
if err != nil {
    log.Fatal(err)
}

for _, commentObj := range listComments {
    fmt.Println("User ID:", commentObj.User.ID())
    fmt.Println("User Name:", commentObj.User.DisplayName())
    fmt.Println("Date Post:", commentObj.DatePost())
    fmt.Println("Comment ID:", commentObj.CommentID())
    fmt.Println("InReplyTo:", commentObj,InReplyTo())
    fmt.Println("Comment Raw:", commentObj.Raw())   // Usually markdown
    fmt.Println("Comment HTML:", commentObj.HTML()) // Parsed HTML
}

[KEINOS]

• Fields of GistComment
• Example query with some fields

  {
    viewer {
      gist(name: "78cc23f37e55e848905fc4224483763d") {
        comments(last: 100) {
          edges {
            node {
              id
              authorAssociation
              author {
                avatarUrl
                login
              }
              createdAt
              lastEditedAt
              body
              bodyHTML
              bodyText
            }
          }
        }
      }
    }
  }

• Try query online: https://docs.github.com/ja/graphql/overview/explorer