Add bookmarklet support for Skland

[nottalulah]

Dunno if it's worth the time but figured I'd ask anyway. Hypergryph made their own social network, seems some artists have been posting there.

Example post: https://www.skland.com/article?id=1827735
Image URL: https://bbs.hycdn.cn/image/2024/04/29/576904/1dc98f0a6780ddcbc107d77bfdba673f.webp

I think they only serve webps. The API returns a user ID/name but I haven't figured out whether there is an artist page.