feat: refactored docs structure

apps/docs/components.ts

@@ -1,20 +0,0 @@
-/**
- * Project MDX components, available on every page with no import, and layout
- * slot overrides. Static `.astro` files ship no framework JS (a custom element
- * carries any behaviour); interactive React lives in `islands/` instead.
- */
-import { defineComponents } from "blume";
-
-export default defineComponents({
-  mdx: {
-    Carousel: "./components/Carousel.astro",
-    CarouselImage: "./components/CarouselImage.astro",
-    // MDX's own content wrapper: problem pages' topic + explanation badges, from
-    // `topics:` / `video:` frontmatter, between the description and the body.
-    wrapper: "./components/ProblemBadges.astro",
-  },
-  layout: {
-    // Topic landing pages' "what links here": every problem pointing at the page.
-    PageFooter: "./components/BacklinksList.astro",
-  },
-});