A stock MSYS2 MINGW64 shell ships neither `zip` nor `unzip`, so
`tools_pc/bundle-win.sh` failed at the packaging step for a local release
build (the M-45 handoff's documented v0.1.0 cut path). CI is unaffected
(it `pacman -S zip unzip`, so the `zip` branch is still taken).
Fallback order: zip -> 7z on PATH -> "C:\Program Files\7-Zip\7z.exe" ->
powershell Compress-Archive. Verified end-to-end: bundle builds, unpacks
to a clean dir, prepare-assets runs, ge007.x86_64.exe boots -level_09 to
frame 2100+ crash-free.
James Dansereau
80952f69b8