Create working-directory option

[lucasoares]

The action should have a working-directory option to allow to specify report paths relative to another directory.

[alyssa-dahlberg]

Yes please!

[danielpalme]

I made the necessary change in 325ae3c.
Will create a new release in the next days.

[danielpalme]

I just published a new release. New option workdir is now available.
Would be great if you can test the new option and let me know if it is working for you.

[kubajanusz]

Hello @danielpalme,

I tested change and workingdir is ignored for reports (which might be issue for "monorepos"/ polyrepos/ repos containing many build contexts).

I think it might be confusing, because in Github Actions working-directory is working like cd path (https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#defaultsrunworking-directory).

To deal with this i created PR #26