Expand on version control section (lesson 14)

[anbrav0]

Great book. Would love to provide some expansion on lesson 14, specifically setting up an R environment using version control with Git/Github using the {usethis} package.

some inspo:
https://swcarpentry.github.io/git-novice/
https://usethis.r-lib.org/articles/usethis-setup.html