feat: adds tool just like PAO

[nunomaduro]

With PAO, if we run in the same script

pint
phpstan
pest

The output is:

{"result":"pass"}
{"tool":"phpstan","result":"passed","errors":0}
{"tool":"pest","result":"passed","tests":52,"passed":52,"assertions":90,"duration_ms":534,}

This pull request makes pint consistent with pao, by adding the tool key, and moving "pass" to "passed".

{"tool":"pint","result":"passed"}
{"tool":"phpstan","result":"passed","errors":0}
{"tool":"pest","result":"passed","tests":52,"passed":52,"assertions":90,"duration_ms":534,}