refactor: overhaul homepage and app structure

Simplify homepage, show chapter counts, display directory, trim bottom nav, in-page match feature, move marketing content, and enhance "My" page.

#VERCEL_SKIP

Co-authored-by: undefined <undefined+undefined@users.noreply.github.com>

miniprogram/project.config.json

@@ -49,4 +49,4 @@
     "tabIndent": "insertSpaces",
     "tabSize": 2
   }
-}
+}