Update workflows using a YAML parser instead of overwriting

[zkamvar]

Right now we update our workflows by overwriting the ones we need to overwrite. It would be a good idea to provide a way to update them in a way that only modifies the sandpaper-specific steps so that people can add their own steps if they want to.

[zkamvar]

Note, a custom parser is probably in order to allow for "on":

vubiostat/r-yaml#5 (comment)

[sabaferdous12]

That would be amazing Zhian..

[zkamvar]

There is a go-based tool that can parse YAML and output it to different formats called yq.

It can be downloaded as a standalone binary and it has an associated GitHub Action. It is a perfect tool for this task for doing these kind of fine-grained updates to the GitHub actions because it has tools for updating individual nodes with contents of files: https://mikefarah.gitbook.io/yq/operators/assign-update#update-node-from-another-file

I got this from hrbrmstr's 2023-03-13 daily drop.

The only downside right now is that we can not easily make this a part of {sandpaper} as it is written in Go, which can not (afaik) be embedded in an R package. There are workarounds such as having the binary installed into an application directory, but I would much rather implement something that works via GitHub first.