info lists the System 1 answer cache, the System 2 answer cache used for replay, temporary
spill files and unapplied document sidecars (deferred or pending blocks; they are never
removed here: apply them with gptr_doc(path, sync = TRUE)). prune removes System 2 answers
whose block is neither in its document nor queued for it in a sidecar, System 1 answers unused
for 90 days, temporary files older than getOption("gptr.spill_days", 7) days and older
refreshed model catalogs; clear removes a kind entirely.
Value
info: a gptr_cache_info data frame with columns kind, entries, bytes,
oldest, path. prune and clear: the number of files removed, invisibly.