Add flowR, a slicer and dataflow analyzer for R

[EagleoutIce]

• I have not changed the README.md directly.

As part of my other PRs (#1652, #1653, #1654) I try to improve the coverage of R analyzers within this repository. This (for now, final) PR adds my own tool (if this disclaimer is of importance; it still clears all constraints to be added): flowR.
flowR provides novel dataflow analyses for R, a program slicer, and integration for VS Code and R studio.

Should those be added/linked as part of the description?

[mre]

Thanks for all the contributions.

Since this is your tool, and you know it best, perhaps you'd like to extend the description a bit. Feel free to add any information that might be of help to make an informed decision about whether this is the right tool for the job.

Of course, I would be happy to merge it as is, but since you were asking about that specifically, I thought I'd wait for your reply before merging.

[EagleoutIce]

Thank you for the suggestion! I have now extended on the description and added two resources! From my perspective, this can be merged now :)

[mre]

Looks great. Thanks!