Set up GitHub Actions for Project (GSOC 2021)

[cannin]

@Dharna5599 this would be a good initial step to know how much work is necessary. It would be good to set up automated CRAN checks for the repository to see how far we are from a successful CRAN submission.

Example: https://github.com/korkutlab/targetscore/blob/master/.github/workflows/build_check_package.yml

A badge should also be added on the README

Also, I have created a project and set of milestones related to this work to keep us organized and see how the project is progressing:

https://github.com/cytoscape/cyjShiny/projects https://github.com/cytoscape/cyjShiny/milestones

[Dharna5599]

Thanks, @cannin for setting up the milestones, it became easy to analyze and get started for the task and sure I will start working on it and try to complete them sequentially.

[paul-shannon]

we are deferring github actions until R CMD check with unit tests is working from the shell