Static Detection and Citation of R Package and Function Usage // Scans R source files for package and function use, then builds citations from configurable package universes. Supports .R, .Rmd, and .qmd files, resolves unqualified calls by attachment order and re-export origin, and leaves each package collection to define its own citations. See 'stanflow' https://github.com/VisruthSK/stanflow for an example usage.