feat: add RSS feed generation for Vercord Documentation

- Implemented a new RSS feed feature in rss.ts to enhance content distribution.
- Utilized the 'feed' library to create a structured RSS feed with documentation pages.
- Included metadata such as title, link, and author information for each feed item.

Author: kWAYTV

apps/fumadocs/src/lib/rss.ts

@@ -0,0 +1,34 @@
+import { Feed } from "feed";
+import { source } from "@/lib/source";
+
+const baseUrl = "https://fumadocs.dev";
+
+export function getRSS() {
+  const feed = new Feed({
+    title: "Vercord Documentation",
+    id: `${baseUrl}/docs`,
+    link: `${baseUrl}/docs`,
+    language: "en",
+    image: `${baseUrl}/banner.png`,
+    favicon: `${baseUrl}/icon.png`,
+    copyright: "All rights reserved 2025, Vercord",
+  });
+
+  for (const page of source.getPages()) {
+    feed.addItem({
+      id: page.url,
+      title: page.data.title,
+      description: page.data.description,
+      link: `${baseUrl}${page.url}`,
+      date: new Date(),
+
+      author: [
+        {
+          name: "kWAY",
+        },
+      ],
+    });
+  }
+
+  return feed.rss2();
+}