Tuist Run Report in the GitHub Actions job summary

When Tuist runs in GitHub Actions, it now writes a Tuist Run Report to the Actions job summary. The test and build results for the run show up right on the workflow run page, with a link to the full report on Tuist, and nothing extra to set up.

This is especially useful with merge queues. A merge queue run is not attached to a pull request, so there is no comment to post, and until now you had to wire up your own JUnit reporting to see results. The summary now shows up for every authenticated run, whether it came from a pull request or a queue.