Store workflow in repo

[innovate-invent]

Would it be possible to have the ga file stored in this repo?
Have the CI expand and reformat the JSON so that each element is on its own line. It could then add a commit to the PR with the expanded JSON. This would allow git to better track changes to the workflow.

[mvdbeek]

This is essentially what we're going to do with gxformat2, which also expands the doubly-nested tool state. It also resolves the steps by label, which, if all labels are defined, makes it much easier to understand inputs and outputs.