More folder structure options

[Aaeeschylus]

Some extra sorting options for folder structures would be great for those who would prefer to sort it differently from just "/club/postID".

For example:

/club/year - month/postID
/club/year/month/postID
/club/postTitle

[bitbybyte]

See #91. If this gets implemented, it'll be with a filename timeplate (see -o option in things like yt-dlp), but for now it's just more trouble than it's worth.

[Caxapok-X]

When downloading, I get folders numbered with numbers. How to make the names of posts from the Fantia website.