- extract_assets.sh: detect Homebrew and pass CMAKE_PREFIX_PATH,
OPENSSL_ROOT_DIR, and PKG_CONFIG_PATH when auto-building on macOS
(bare cmake couldn't find Homebrew deps)
- README.md: fix macOS brew command that had comments after line
continuations (breaks shell execution)
- BUILD_INSTRUCTIONS.md: expand macOS asset extraction section with
auto-build note and expansion targets
The sanity check `ls *.MPQ *.mpq` fails under `set -o pipefail`
when only one case variant exists, because ls exits non-zero for
the unmatched glob pattern and pipefail propagates that failure.
Use `compgen -G` to check each glob pattern independently instead.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>