Now that we have this helper, we no longer need these stylesheets to
include a `body.controller-action` wrapper to scope all the styles!
Someday we should convert more of our stylesheets to this format,
instead of slamming them all into `application.sass` like we do now.
Ah, well!
Oh right, all these cute overrides should be scoped to the page!
I guess we skipped this because we had pulled this out into a
separate stylesheet. Curiously learning more about how Turbo handles
this kind of thing, like that it doesn't *unload* stylesheets that
*leave* the page when you navigate!
Mostly this is just me testing out what it would look like to
modularize the app more… I've noticed that some concerns, like
fundraising, are just not relevant to most of the app, and being able
to lock them away inside subfolders feels like it'll help tidy up
long folder lists.
Notably, I haven't touched the models case yet, because I worry that
might be a bit more complex, whereas everything else seems pretty
well-isolated? We'll try it out!
