export command result to action output

[lavigne958]

Overview

The flaky command outputs the result of all found flaky tests.
Export it to the action output

Details

As a user of this action, I have a workflow that uses this action after running my test suite.
From there I can read the output of the action Falky.

I would like to use that output from the console and put it somewhere, upload it somewhere, send notifications somewhere when I find flaky tests etc.

It would be useful to print the flaky command output to the console and export it to the github action output system so the calling workflow can take the output and do something with it.

If interested I can pull up a pull request with it.