Draft: Mod tracker rework

Created by: ShittyKopper

Ported over the reworked mod player code from Firefish, replacing the current canvas based renderer with a DOM based one, and lazily loading libopenmpt only when needed.

I reverted all the styling changes that weren't necessary for the DOM renderer due to the pending media UI changes from upstream. I'd like to attempt to make the mod player consistent with that once it's merged.

I also went ahead and module-ified the CSS classes to be more in line with latest Misskey coding practices.

(Does not fix the mod player not working on dev mode. The vite dev server doesn't seem to like how libopenmpt loads it's wasm binary.)