Add a macOS application

Apple Silicon applications belong in the consumer repository’s config/mise/config.macos-arm64.toml:

maison app add example-app
maison user plan
maison user apply

app add requires a clean Git authoring checkout of the consumer, refreshes it fast-forward-only, and refuses a dirty application declaration before installing. It records the declaration only after successful installation and creates a focused added(app): \ghostty`commit.app remove` leaves installed data in place and creates the corresponding focused removal commit. Maison is never a fallback mutation target.

Mac App Store entries use numeric mas: identifiers in the same file. System-wide fonts remain in nix/modules/darwin/fonts.nix. Casks that install OS integrations, such as FUSE-T, require an explicit nix-darwin module review instead of being added to the mise user package list.

Intel macOS is not a supported Maison target.