refactor: move app directories

frontend/src/routes/index.tsx

@@ -0,0 +1,16 @@
+import ConversationsHistory from "@/components/conversations-history";
+import CreateConversation from "@/components/create-conversation";
+import { createFileRoute } from "@tanstack/react-router";
+
+export const Route = createFileRoute("/")({
+  component: Index,
+});
+
+function Index() {
+  return (
+    <div className="flex flex-col gap-3 p-2">
+      <CreateConversation />
+      <ConversationsHistory />
+    </div>
+  );
+}