consolidate relevant resources to OMNI R resources repo

[OskaratOmni]

Hey @dgkeyes and @tvroylandt I have created a repository as a new place to put the ggplot gallery and future related resources. I have added you both so you probably already have notifications to this effect. The 'issue' is to move the ggplot gallery there.

https://github.com/OMNI-Institute-QuantBPT/OMNI-R-Resources

[tvroylandt]

Thanks Oskar. No worry, I'll move that over the weekend in the new repo

[tvroylandt]

I'm closing this one (plus https://github.com/rfortherestofus/omni/issues/34, https://github.com/rfortherestofus/omni/issues/35, https://github.com/rfortherestofus/omni/issues/33, https://github.com/rfortherestofus/omni/issues/32) in favor of more detailed issues in https://github.com/OMNI-Institute-QuantBPT