output lint result as a machine friendly format

[LeoQuote]

We are considering using it in jenkins pipeline rather than github actions, if there's a -o options to output lint result as those format, it would be very useful.

• checkstyle
• json
• golint , each line for each error

[thejuan]

Keen to see JSON as well, are you accepting PRs?

[nogweii]

A golint or similar style would be appreciated to be able to have pint's errors appear in code reviews via reviewdog.