feat: Add metadata support for peer discovery events

- Add metadata field to PeerDiscoveredEvent interface
- Add metadata field to PeerInfo interface
- Update event handler to forward metadata from native events
- Enables proper user identification in discovery

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -1,11 +1,11 @@
 {
   "name": "@metatrom/libp2p-native-bridge",
-  "version": "1.0.0",
+  "version": "1.2.0-beta.1",
   "main": "index.ts",
   "type": "module",
   "description": "Native libp2p bridge for React Native applications",
   "metatrom": {
-    "ior": "com.metatrom.libp2p-native-bridge@1.0.0",
+    "ior": "com.metatrom.libp2p-native-bridge@1.2.0-beta.1",
     "capabilities": {
       "p2p": true,
       "contracts": false,