Add render readme workflow- this updates README.md and submits it as a PR everytime changes are made to README.Rmd - I hope this can help keep the readme docs more in sync.
Update README.Rmd and the pkgdown yml- Some links were stale, so they were updated; some minor formatting changes also made.
update ghas - I realized we had 2 r cmd check workflow that were running, so I got rid of the full check, since I thought just running on the current version of R and 3 OSes should be sufficient for this project. I added a cron job to weekly run r cmd check to make sure this pkg continues to pass r cmd check even when not being actively developed. I also streamlined the build triggers for the pkgdown workflow, because I think every push to main should cover tags being added?