Scaffold betydata R package (usethis + renv + CI)

[dlebauer]

Goal

• Create a minimal R package scaffold for betydata that passes R CMD check and is ready to receive data objects.

Tasks

• Scaffold with usethis:
  • usethis::create_package(".", open = FALSE)
  • usethis::use_readme_rmd()
  • usethis::use_testthat()
  • usethis::use_github_actions()
• Initialize dependency lockfile:
  • renv::init()
• Add an RStudio project file (optional but common): usethis::use_rstudio()
• Add your R coding preferences as inst/STYLE_GUIDE.md (source: /mnt/data/r_coding_preferences.md)

Acceptance criteria

• Repo contains standard package structure (DESCRIPTION, NAMESPACE, R/, man/, tests/).
• GitHub Actions R CMD check is green on main and PRs.
• inst/STYLE_GUIDE.md exists.

Non-goals

• No data committed in this issue.