Generate RO-Crate with ODMAP protocol info from R

[juliancervos]

Recap of the Cultural Ecosystem Services (CES) pDT work on this topic so far:

• We chose to follow the ODMAP protocol as a standard to provide information about the different elements of the pDT.
• A ODMAP report document is generated together with the execution of the code, see uc-ces repo.
• Since the report is not machine-actionable, we would like to have an equivalent RO-Crate with the same information, or at least with some basic info and pointing at the ODMAP report for further details.
• The lack of a native R package for managing RO-Crates (similar to ro-crate-py for Python), together with the lack of R developers in WP5, pose an impediment for that.
• We chose to give a try to reticulate, an R package that allows the execution of Python code from R.

For reference, I updated the RO-Crate metadata file for the CES pDT biodiversity model. It's a good example of how it could look like, but we can change things depending on how we manage to generate them from the code and similar aspects.
There are other examples in this repo, including this script (from the Grassland pDT) which is a good example of how to generate RO-Crates from code using ro-crate-py. Also, the metadata attributes are explained in the Discussions page.