Parses a .dvc pointer file and downloads the corresponding data file from
the public Cloudflare R2 remote.
Examples
x <- system.file("extdata/dvc-example/sampleA.tool1.table1.tsv.dvc", package = "nemo")
output_dir <- file.path(tempdir(), "dvc_single_test")
result <- dvc_download_file(x, output_dir)
result_cached <- dvc_download_file(x, output_dir, overwrite = FALSE)
