[Feature] Support Plana

[olivertzeng]

Plana is peak and there's no reason not to add her

[SethClydesdale]

Agreed. This is something that I've actually had on my todo list, but I haven't gotten around to it since I've been busy with other projects. I did experiment around with her implementation here a bit ago and I'd probably take the same approach with this tool. That is, displaying Plana at night and Arona during the day.