Build basic, R-package infrastructure

[maurolepore]

• [x] usethis::use_readme_rmd()
• [x] usethis::use_pkgdown_github_pages()
• [x] usethis::use_tidy_description()
• [x] usethis::use_package_doc() Consider letting usethis manage your @importFrom directives here. usethis::use_import_from() is handy for this.
• [x] usethis::use_testthat(). Learn more about testing at https://r-pkgs.org/tests.html
• [x] Align the names of R/ files and test/ files for workflow happiness. The docs for usethis::use_r() include a helpful script. usethis::rename_files() may be be useful.
• [ ] usethis::use_code_of_conduct()
• [ ] Add alt-text to pictures, plots, etc; see https://posit.co/blog/knitr-fig-alt/ for examples

Set up or update GitHub Actions. \ Updating workflows to the latest version will often fix troublesome actions:

• [x] usethis::use_github_action('check-standard')

^{Created on 2024-05-22 with usethis::use_upkeep_issue(), using usethis v2.2.3}