Add automated checking of code repository to help codecheckers or (CODECHECK) editors

[nuest]

Let's try to capture some steps of the human evaluation process in a tool so that we can "pre-check" the contents of a workflow repository:

• Is there a README?
• Is there a license?
• Does the README mention the figures and tables from the paper (clear connection between outputs and code files)?
• Is there an environment documentation or file (cf. repo2docker REES spec)
• Do all links (and DOIs) resolve?
• Are execution times mentioned in the README?
• If HPC is mentioned, is a sample dataset also mentioned?
• Are any full paths in documentation or code files (/home/.., C:\Users\.., etc.)
• ...

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Tools that show how the interaction could work:

• https://github.com/MangoTheCat/goodpractice/
• https://docs.ropensci.org/checkers/