feat: Complete multi-blog setup with 12 collections and subdomain routing

- Added 12 blog collections: art, bfs, dfs, problems, puzzles, reviews, reflections, vibes, workflows, magic, contests, poetry
- Created content config with glob loaders for all collections
- Added sample posts for each collection
- Fixed TypeScript collection recognition by removing duplicate config
- Made BlogPosts component collection-aware for proper routing
- Created individual post pages ([...slug].astro) for each collection
- Added Netlify subdomain routing configuration
- Updated all references to use neeldhara.blog as main domain
- Fixed navigation links in all-blogs component

Ready for GitHub/Netlify deployment with subdomain support.

src/pages/poetry/rss.xml.js

@@ -0,0 +1,15 @@
+import rss from "@astrojs/rss";
+import { getCollection } from "astro:content";
+
+export async function GET(context) {
+  const posts = await getCollection("poetry");
+  return rss({
+    title: "Poetry - Code in Verse",
+    description: "Programming concepts expressed through haikus, sonnets, and creative verse.",
+    site: context.site,
+    items: posts.map((post) => ({
+      ...post.data,
+      link: `/poetry/${post.id}/`,
+    })),
+  });
+}