Function prose_links_keep 

pub(crate) fn prose_links_keep(manifest_dir: &Path) -> bool

Whether the crate sets roxygen_prose_links = "keep" under [package.metadata.miniextendr]: leading doc prose then keeps its links on the way to roxygen2. Same line scanner as lib_path_from_manifest; a missing, unreadable or malformed value reads as the default ("strip").