Consolidate MangaCircus app, scraper, and Compose baseline

public/collection.html

@@ -0,0 +1,2 @@
+<!doctype html>
+<html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>Collection · MangaCircus</title><link rel="stylesheet" href="app.css"><script src="common.js" defer></script><script src="collection.js" defer></script></head><body><main><p>Loading…</p></main></body></html>