Adding a new feature of streaming the result out to `stdout`

[gitdevjin]

Summary

Currently this tool doesn't support getting the result in stdout. Therefore, it would be useful for user to provide an option -s, --stream so that they can get the result on stdout. It would also be great to get the result as a streaming object vs getting it all at once.

Steps of task

1. Implement the request object that requires API to return stream object as a response
2. Print them out into stdout in real time.
3. Test the new feature.

Caution

1. When -s, --stream flag is on, -o, --output flag will be ignored.

[gitdevjin]

Closed by 6610de5