feat: Implement broadcaster-hosted TURN functionality over Hyperswarm. Remove the need for Google TURN/STUN servers.

- Modified code to enable the broadcaster to act as a TURN server using Hyperswarm connections.
- Replaced external STUN/TURN servers with custom signaling over Hyperswarm.
- Configured RTCPeerConnection with an empty ICE servers array to prevent reliance on external servers.
- Implemented custom signaling protocol for exchanging offers, answers, and ICE candidates over Hyperswarm connections.
- Updated broadcaster to relay media streams, effectively mimicking TURN server behavior within the Hyperswarm network.
- Adjusted peer connection setup for both broadcaster and listener to use Hyperswarm for signaling and data transport.
- Removed dependency on third-party servers; all communication now occurs within the peer-to-peer network.
- Updated UI elements and controls to reflect the changes.
- Ensured that peer count updates correctly with new connection handling.

index.html

@@ -34,7 +34,7 @@
       <button id="open-join-modal" class="btn btn-secondary" data-bs-toggle="modal" data-bs-target="#joinModal">Join Station</button>
     </div>
     <div id="controls" class="d-none mt-4">
-      <p id="station-info"></p>
+        <p id="station-info"></p>
       <button id="leave-stream" class="btn btn-danger mt-2">Leave Broadcast</button>
 
       <!-- Broadcaster-only Controls -->