refactor: use specta for commands (#192)

* feat: add tauri-specta

* refactor: system library

* chore: format

packages/system/src/dedup.ts

@@ -0,0 +1,28 @@
+import { NostrEvent } from "@lume/types";
+
+export function dedupEvents(nostrEvents: NostrEvent[], nsfw: boolean = false) {
+	const seens = new Set<string>();
+	const events = nostrEvents.filter((event) => {
+		const eTags = event.tags.filter((el) => el[0] === "e");
+		const ids = eTags.map((item) => item[1]);
+		const isDup = ids.some((id) => seens.has(id));
+
+		// Add found ids to seen list
+		for (const id of ids) {
+			seens.add(id);
+		}
+
+		// Filter NSFW event
+		if (nsfw) {
+			const wTags = event.tags.filter((t) => t[0] === "content-warning");
+			const isLewd = wTags.length > 0;
+
+			return !isDup && !isLewd;
+		}
+
+		// Filter duplicate event
+		return !isDup;
+	});
+
+	return events;
+}