slab/menuband: extract MenuBand into its own standalone app master
Splits the menubar-piano work out of slab-menubar into a dedicated MenuBand.app — a political project to bring the built-in macOS GM instruments into the menu bar where they belong. slab/menuband/ - SPM target (Sources/MenuBand) with NotepatController + virtual MIDI source + AVAudioUnitSampler synth + global key-event tap + popover settings panel. - install.sh wraps the binary in MenuBand.app with stable bundle id computer.aestheticcomputer.menuband, auto-detects an Apple Developer cert in keychain, falls back to a self-signed identity. - notarize.sh + MenuBand.entitlements ready for direct distribution once a Developer ID Application cert is installed. - AppIcon.icns: thin wide piano on a deep gradient squircle — visualizes the "menu-constrained piano" framing. slab/menubar-swift: drop the embedded notepat code now that it lives in its own bundle. MenuBuilder no longer references NotepatController.