macOS terminal app support

[chawyehsu]

There's https://github.com/vbwx/base16-terminal-app but outdated. From the repo it seems extra steps need to be taken to generate recognizable theme files for terminal app.

It'd be great to have tinted theme support for builtin terminal app aside from existing terminal solutions.

[JamyGolden]

Thanks for creating the issue and sorry for the long reply time. Github isn't notifying the maintainers here atm so we're not getting notifications 😅

I'll look into adding MacOS Terminal.app support. It's a bit more complicated than the other themes we have here so I'll have to update the builder to support the new requirements.