Extract any of the supported Quake archives.
qarchive.extract(filepath, outdir, format = "auto", do_pre_checks = TRUE)
character string, path to existing and readable file in PAK or WAD2 format.
character string, path to an existing and writeable output directory into which to extract the archive.
character string, of one 'auto' to detect from filename, 'QARCHIVE_TYPE_WAD' for WAD2, or 'QARCHIVE_TYPE_PAK' for PACK.
logical, whether to perform extra sanity checks on the other parameters.