feat: implement dynamic P2P polling app with real-time synchronization

- Add complete P2P polling application with React + TypeScript frontend
- Implement Node.js backend with Yjs WebSocket and WebRTC signaling
- Support dynamic poll creation, answer management, and voting
- Add CRDT-based state synchronization using Yjs for conflict-free merging
- Implement user tracking and vote prevention (one vote per user per option)
- Create modern UI with Tailwind CSS and visual feedback
- Add comprehensive documentation and setup instructions

Features:
- Users can create polls with custom questions
- Anyone can add answer options to any poll
- Real-time voting with instant cross-client synchronization
- Smart vote tracking with visual feedback for voted options
- User attribution showing who created polls and options
- Connection status indicators for WebSocket and P2P connections

Technical:
- Hybrid P2P architecture (WebSocket + WebRTC)
- CRDT-based state management with Yjs

frontend/src/components/VoteButton.tsx

@@ -0,0 +1,25 @@
+import { ThumbsUp } from 'lucide-react';
+
+interface VoteButtonProps {
+  optionId: string;
+  votes: number;
+  onVote: (optionId: string) => void;
+  disabled?: boolean;
+}
+
+export function VoteButton({ optionId, votes, onVote, disabled = false }: VoteButtonProps) {
+  return (
+    <button
+      onClick={() => !disabled && onVote(optionId)}
+      disabled={disabled}
+      className={`flex items-center gap-2 px-4 py-2 rounded-lg transition-all duration-200 text-white font-medium ${
+        disabled 
+          ? 'bg-white/10 cursor-not-allowed opacity-60' 
+          : 'bg-white/20 hover:bg-white/30'
+      }`}
+    >
+      <ThumbsUp className="w-4 h-4" />
+      <span>{votes}</span>
+    </button>
+  );
+}