feat: add rss widget (#760)

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

packages/widgets/src/rssFeed/index.ts

@@ -0,0 +1,32 @@
+import { IconRss } from "@tabler/icons-react";
+
+import { z } from "@homarr/validation";
+
+import { createWidgetDefinition } from "../definition";
+import { optionsBuilder } from "../options";
+
+/**
+ * Feed must conform to one of the following standards:
+ * - https://www.rssboard.org/rss-specification (https://web.resource.org/rss/1.0/spec)
+ * - https://datatracker.ietf.org/doc/html/rfc5023
+ * - https://www.jsonfeed.org/version/1.1/
+ */
+export const { definition, componentLoader, serverDataLoader } = createWidgetDefinition("rssFeed", {
+  icon: IconRss,
+  options: optionsBuilder.from((factory) => ({
+    feedUrls: factory.multiText({
+      defaultValue: [],
+      validate: z.string().url(),
+    }),
+    textLinesClamp: factory.number({
+      defaultValue: 5,
+      validate: z.number().min(1).max(50),
+    }),
+    maximumAmountPosts: factory.number({
+      defaultValue: 100,
+      validate: z.number().min(1).max(9999),
+    }),
+  })),
+})
+  .withServerData(() => import("./serverData"))
+  .withDynamicImport(() => import("./component"));