Support for output of github actions in annotation format

[k2tzumi]

Proposal

I want to display an error message on the code if there is an error when incorporating runn into Github actions.

Allow errors to be output in the following format
https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-error-message

As the development cycle of the product is to create a scenario that will end successfully locally and then push to git, the priority seems to be quite low.
The idea is to have a simple error output that can be used in various ways, not limited to Github actions.

[k1LoW]

Great !!

I thought it would be good to implement the switching of output by env GITHUB_ACTION directly into runn.

[k2tzumi]

I thought it would be good to implement the switching of output by env GITHUB_ACTION directly into runn.

looking good.
I think phpstan and others behaved like that.