continuous build

Rolling build from main (about every 10h, skipped when main hasn't moved).

Unsigned, work-in-progress snapshot — expect breakage. macOS builds are
not signed or notarized, so Gatekeeper will warn (see README-release.txt
inside each archive for the xattr workaround).

ROMs are never included. You need your own MU2000 dumps; instructions:
manual.en.md — Preparing the ROMs (or README-release.txt).