Add a "blank book" to allow the user to track reading material not applicable to Natively

[Jintor]

I back this request - I have some Pixiv/twitter comics (気になっている人は男じゃなかった！ ー https://twitter.com/agu_knzm/status/1512998788025110532) and VNs /games（逆転裁判所）I would love to be able to log, though god knows how you would track progress on the games.