feat: add rss widget (#760)

Co-authored-by: SeDemal <demal.sebastien@bluewin.ch>

packages/api/src/router/widgets/rssFeed.ts

@@ -0,0 +1,12 @@
+import type { RssFeed } from "@homarr/cron-jobs";
+import { createItemChannel } from "@homarr/redis";
+
+import { createOneItemMiddleware } from "../../middlewares/item";
+import { createTRPCRouter, publicProcedure } from "../../trpc";
+
+export const rssFeedRouter = createTRPCRouter({
+  getFeeds: publicProcedure.unstable_concat(createOneItemMiddleware("rssFeed")).query(async ({ input }) => {
+    const channel = createItemChannel<RssFeed[]>(input.itemId);
+    return await channel.getAsync();
+  }),
+});