Support BeatSaver bookmarks

[Top-Cat]

BSaber user functions such as bookmarks are largely deprecated. It's basically impossible to make a new account on the site and the advice is not to try. The site is intended to continue as "a more well-rounded community hub".

See message in the bsaber discord:
https://discord.com/channels/452928402203344908/456256529654611968/1064604902569029642

BeatSaver supports oauth login so users don't have to enter credentials into a 3rd party app and bookmarks can be retreived via https://api.beatsaver.com/bookmarks/{page}?pageSize={size}

[kuba2k2]

Cool, I didn't realize that BeatSaver supported bookmarks.

Back when I made this plugin (about 1-2 years ago) the whole point of bookmarking on BSaber was for me to use the (old, deprecated, unmaintained - but still working on 1.29.0) SyncSaber plugin, which automatically downloaded my BSaber bookmarks in-game. I don't think it can download from BeatSaver though.

Sure, the bookmarking function is largely useless now, as with Backend installed one can download maps directly to the game folder. I'll consider adding BeatSaver bookmarks support too, when I find time to maintain this plugin.

Also, I was planning to make a simple GUI for easy in-game playlist management... seems like a cool feature to have right in Spotify.