chore: migrate to rodio v0.21.1
feat: add a currently nonfunctional source argument to the scrape
command
well, this is an important commit for anyone who has some interest in
the workings of lowfi, so strap in.
rodio finally updated cpal, so that ugly unsafe bit of code to implement
send is no longer necessary since cpal did it themselves (a year ago)
they also removed output stream handles and some other things which
nobody really used anyway.
next, the other file types is literally not even code, just adding a
feature flag which enables the default rodio feature flags. i do feel a
bit silly for thinking it'd be super difficult, so thanks rodio.
lastly, the source flag is for a possible switch to the chillhop
tracklist. anything embedded into lowfi should be generated with an open
source script, hence if lowfi does switch to chillhop, it'll need to be
selectable.
